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  • Inorganic Chemistry  (1,632)
  • Aircraft Design, Testing and Performance
  • Seismology
  • Industrial Chemistry
  • 2015-2019  (876)
  • 1950-1954  (3,048)
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  • 1
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    Unknown
    The AlpArray Seismic Network: A Large-Scale European Experiment to Image the Alpine Orogen (2019)
    Details
    Publication Date: 2019-12-05
    Description: The AlpArray programme is a multinational, European consortium to advance our understanding of orogenesis and its relationship to mantle dynamics, plate reorganizations, surface processes and seismic hazard in the Alps–Apennines–Carpathians–Dinarides orogenic system. The AlpArray Seismic Network has been deployed with contributions from 36 institutions from 11 countries to map physical properties of the lithosphere and asthenosphere in 3D and thus to obtain new, high-resolution geophysical images of structures from the surface down to the base of the mantle transition zone. With over 600 broadband stations operated for 2 years, this seismic experiment is one of the largest simultaneously operated seismological networks in the academic domain, employing hexagonal coverage with station spacing at less than 52 km. This dense and regularly spaced experiment is made possible by the coordinated coeval deployment of temporary stations from numerous national pools, including ocean-bottom seismometers, which were funded by different national agencies. They combine with permanent networks, which also required the cooperation of many different operators. Together these stations ultimately fill coverage gaps. Following a short overview of previous large-scale seismological experiments in the Alpine region, we here present the goals, construction, deployment, characteristics and data management of the AlpArray Seismic Network, which will provide data that is expected to be unprecedented in quality to image the complex Alpine mountains at depth.
    Description: Published
    Description: 1009–1033
    Description: 1T. Struttura della Terra
    Description: JCR Journal
    Keywords: Seismology ; Alps ; Seismic network ; Geodynamics ; Seismic imaging ; Mountain building
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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    PAPER (OA)
  • 2
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    Unknown
    Journal of Geophysics - Zeitschrift für Geophysik 60 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148:60
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 26 Artikel zu Themengebieten der Geophysik, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1986.
    Description: Inhaltsverzeichnis: Journal of Geophysics 60 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0011.pdf"〉Investigation of the velocity- and Q-structure of the lowermost mantle using 〈i〉PcP〈/i〉/〈i〉P〈/i〉 amplitude ratios from arrays at distances of 70°–84°〈/a〉〈br〉 (Schlittenhardt, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0014.pdf"〉Fast plane-wave and single-shot migration by Fourier transform〈/a〉〈br〉 (Temme, P., Müller, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0015.pdf"〉A method of calculating lithosphere thickness from observations of deglacial land uplift and tilt〈/a〉〈br〉 (Wolf, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0016.pdf"〉Volcanoes, fountains, earthquakes, and continental motion – What causes them? 〈/a〉〈br〉 (Kundt, W., Jessner, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0017.pdf"〉Magnetic properties and oxidation experiments with synthetic olivines〈/a〉〈br〉 (Fe〈sub〉χ〈/sub〉Mg〈sub〉1–χ〈/sub〉)〈sub〉2〈/sub〉SiO〈sub〉4〈/sub〉, 0≦χ≦1 (Hoffmann, V., Soffel, H.C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0018.pdf"〉Magnetic mineralogy of basalts from El-Bahnasa and Tahna, Egypt〈/a〉〈br〉 (Wassif, N.A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0020.pdf"〉On the use of line current analogues in geomagnetic depth sounding〈/a〉〈br〉 (Jones, A.G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0021.pdf"〉Observations of the VLF quiet band phenomenon〈/a〉〈br〉 (Matthews, J.P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0022.pdf"〉In memoriam Gustav Adolf Schulze (1911–1986)〈/a〉〈br〉 (Dürschner, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0023.pdf"〉Book reviews〈/a〉〈br〉 (Berckhemer, H., Dieminger, W., Engelhard, L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0024.pdf"〉Hydromagnetic waves at low latitudes: a symposium review from the fifth IAGA assembly〈/a〉〈br〉 (Fraser, B.J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0025.pdf"〉Generation and propagation mechanisms of low-latitude magnetic pulsations – A review〈/a〉〈br〉 (Yumoto, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0026.pdf"〉Experimental aspects of low-latitude pulsations - A review〈/a〉〈br〉 (Verö, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0027.pdf"〉GRF broad-band array analysis of the 1982 Miramichi, New Brunswick earthquake sequence〈/a〉〈br〉 (Basham, P.W., Kind, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0028.pdf"〉Rockmagnetism and palaeomagnetism of an early Cretaceous/Late Jurassic dike swarm in Rio Grande do Norte, Brazil〈/a〉〈br〉 (Bücker, C., Schult, A., Bloch, W., Guerreiro, S.D.C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0029.pdf"〉Second Conference on Scientific Ocean Drilling〈/a〉〈br〉 (COSOD II)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0030.pdf"〉Book reviews〈/a〉〈br〉 (Jentzsch, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0031.pdf"〉Deep-seated lateral velocity variations beneath the GRF array inferred from mislocation patterns and P residuals〈/a〉〈br〉 (Faber, S., Plomerová, J., Babuška, V.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0034.pdf"〉Lateral variations of the structure of the crust-mantle boundary from conversions of teleseismic 〈i〉P〈/i〉 waves〈/a〉〈br〉 (Qiyuan, L., Kind, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0035.pdf"〉Cross spectral analysis of Swabian Jura (SW Germany) three-component microearthquake recordings〈/a〉〈br〉 (Scherbaum, F., Wendler, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0036.pdf"〉The retrieval of the seismic moment tensor from first-order perturbation theory and generation of compatible models〈/a〉〈br〉 (Lana, X., Correig, A.M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0037.pdf"〉Impulsive processes in the magnetotail during substorm expansion〈/a〉〈br〉 (Sergeev, V.A., Bösinger, T., Lui, A.T.Y)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0038.pdf"〉Spatial and temporal characteristics of impulsive structure of magnetospheric substorm〈/a〉〈br〉 (Sergeev, V.A., Pellinen, R.J., Bösinger, T., Baumjohann, W., Stauning, P., Lui, A.T.Y.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0039.pdf"〉Seismic signal velocity in absorbing media〈/a〉〈br〉 (Schmidt, T., Müller, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0040.pdf"〉In memoriam Nachruf Professor Ludwig Biermann〈/a〉〈br〉 (Treffitz, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0041.pdf"〉Book Reviews〈/a〉〈br〉 (Korn, M.)〈/a〉〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DFG, SUB Göttingen
    Keywords: 550 ; Earthquakes ; Earth's Mantle ; Geomagnetic Pulsations ; Germany ; Inverse Problems ; Magnetosphere ; Rock Magnetism ; Seismology ; Seismograms ; FID-GEO-DE-7
    Language: English
    Type: anthology_digi
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    CITATION GEO-LEO
  • 3
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    Unknown
    Journal of Geophysics - Zeitschrift für Geophysik 49 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148:49
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält Artikel zu 41 Themengebieten der Geophysik, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1981.
    Description: Inhaltsverzeichnis: Journal of Geophysics 49 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0011.pdf"〉Palaeomagnetism of a Jurassic Ophiolite Series in East Elba (Italy) 〈/a〉〈br〉 (Soffel, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0013.pdf"〉Paleomagnetic Evidence from Mesozoic Carbonate Rocks for the Rotation of Sardinia〈/a〉〈br〉 (Horner, F., Lowrie, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0015.pdf"〉A Geotectonic Paradox: Has the Earth Expanded? 〈/a〉〈br〉 (Schmidt, P. W., Embleton, B. J. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0016.pdf"〉Application of Magnetotelluric and DC Electrical Resistivity Methods in the Neapolitan Geothermal Area〈/a〉〈br〉 (Hunsche, U., Rapolla, A., Musmann, G., Alfano, L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0018.pdf"〉Velocity Variations in Systems of Anisotropic Symmetry〈/a〉〈br〉 (Crampin, S., Kirkwood, S. C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0019.pdf"〉Shear-Wave Singularities of Wave Propagation in Anisotropic Media〈/a〉〈br〉 (Crampin, S., Yedlin, M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0020.pdf"〉Temperature Derivatives of Compressional and Shear Wave Velocities in Crustal and Mantle Rocks at 6 kbar Confining Pressure〈/a〉〈br〉 (Kern, H., Richter, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0021.pdf"〉A Crustal Gravity Model of the Mare Serenitatis - Mare Crisium Area of the Moon〈/a〉〈br〉 (Janle, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0022.pdf"〉On the Origin of the Annual Wave in Hemispheric Geomagnetic Activity〈/a〉〈br〉 (Meyer, J., Damaske, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0023.pdf"〉On the Relation Between Magnetic Field-Aligned Electrostatic Electron Acceleration and the Resulting Auroral Energy Flux〈/a〉〈br〉 (Wilhelm, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0024.pdf"〉Application of Different Methods for the Determination of Ionospheric Conductivities from Sounding Rocket Observations〈/a〉〈br〉 (Brüning, K., Baumjohann, W., Wilhelm, K., Stüdemann, W., Urban, A., Ott, W., Spenner, K., Schmidtke, G. L., Fischer, H. M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0025.pdf"〉Numerical Experiments on Convection in a Chemically Layered Mantle〈/a〉〈br〉 (Christensen, U.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0026.pdf"〉〈i〉Book Reviews〈/i〉〈/a〉〈br〉 (Raikes, S. A., Engelhard, L., Pape, H., Theile, B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0028.pdf"〉Steady State Creep of Fine Grain Granite at Partial Melting〈/a〉〈br〉 (Auer, F., Berckhemer, H., Oehlschlegel, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0029.pdf"〉Laboratory Synthesis of Aluminium-Substituted Titanomaghemites and Their Characteristic Properties〈/a〉〈br〉 (Özdemir, Ö, O’Reilly, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0030.pdf"〉Densities and Magnetic Susceptibilities of Precambrian Rocks of Different Metamorphic Grade〈/a〉〈br〉 (Southern Indian Shield) (Subrahmanyam, C., Verma, R. K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0031.pdf"〉Lithospheric Structure and Teleseismic 〈i〉P〈/i〉-Wave Reflection Delays Under Fennoscandia and Siberia〈/a〉〈br〉 (Stewart, Ian C. F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0033.pdf"〉Propagation of Surface Waves in Marine Sediments〈/a〉〈br〉 (Essen, H.-H., Janle, H., Schirmer, F., Siebert, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0035.pdf"〉Simultaneous Observation of an Intense 65 keV Field-Aligned Proton Beam and ULF-waves During a Break-up Event〈/a〉〈br〉 (Stüdemann, W., Goertz, C. K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0036.pdf"〉Observations of Field-Aligned Current Sheets Above Discrete Auroral Arcs〈/a〉〈br〉 (Wilhelm, K., Klöcker, N., Theile, B., Ott, W., Spenner, K., Grabowski, R., Wolf, H., Stüdemann, W., Dehmel, G., Fischer, H. M., Schmidtke, G. L., Baumjohann, W., Riedler, W., Urban, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0038.pdf"〉Multi-Method Observations and Modelling of the Three-Dimensional Currents Associated with a Very Strong Ps6 Event〈/a〉〈br〉 (Gustafsson, G., Baumjohann, W., Iversen, I.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0040.pdf"〉Variability of Solar EUV Fluxes and Exospheric Temperatures〈/a〉〈br〉 (Schmidtke, G., Börsken, N., Sünder, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0041.pdf"〉Paleomagnetism of Quaternary and Miocene Lavas from North-East and Central Morocco〈/a〉〈br〉 (Najid, D., Westphal, M., Hernandez, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0042.pdf"〉In Memoriam Wilhelm Hiller〈/a〉〈br〉 (Schneider, Götz)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0043.pdf"〉〈i〉Book Reviews〈/i〉〈/a〉〈br〉 (Wilhelm, H., Neubauer, F. M., Schopper, J. R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0044.pdf"〉Joint Two-Dimensional Observations of Ground Magnetic and Ionospheric Electric Fields Associated with Auroral Zone Currents〈/a〉〈br〉 (Inhester, B., Baumjohann, W., Greenwald, R. A., Nielsen, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0045.pdf"〉Current Flow in Auroral Forms Responsible for Ps 6 Magnetic Disturbances〈/a〉〈br〉 (Rostoker, G., Apps, K. S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0046.pdf"〉Correlation of Geomagnetic Activity Indices ap with the Solar Wind Speed and the Southward Interplanetary Magnetic Field〈/a〉〈br〉 (Schreiber, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0047.pdf"〉High Time-Resolution Correlation Between the Magnetic Field Behaviour at 37 〈i〉R〈/i〉〈sub〉E〈/sub〉 Distance in the Magnetotail Plasma Sheet and Ground Phenomena During Substrom Expansive Phase〈/a〉〈br〉 (Sergeev, V. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0048.pdf"〉Simultaneous Observations of Energetic Protons Close to the Bow Shock and Far Upstream〈/a〉〈br〉 (Scholer, M., Ipavich, F. M., Gloeckler, G., Hovestadt, D.)〈/a〉〈/li〉 〈li〉〈a href=" https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0049.pdf"〉Non-Adiabatic Expansion of Low-Temperature Solar Wind Radial Temperature Gradients〈/a〉〈br〉 (Geranios, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0050.pdf"〉Correlation Between Seismic Microactivity, Temperature and Subsidence of Water Level at Reservoirs〈/a〉〈br〉 (Merkler, G., Bock, G., Fuchs, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0052.pdf"〉〈sup〉40〈/sup〉Ar/〈sup〉39〈/sup〉Ar Dating of Himalayan Rocks from the Mount Everest Region〈/a〉〈br〉 (Kaneoka, Ichiro, Kono, Masaru)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0053.pdf"〉A Comparison of the Thermal and Mechanical Structure of the Lithosphere Beneath the Bohemian Massif and the Pannonian Basin〈/a〉〈br〉 (Onuoha, K. M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0054.pdf"〉Extremal Models for Electromagnetic Induction in Two-Dimensional Perfect Conductors〈/a〉〈br〉 (Weidelt, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0055.pdf"〉On a Type Classification of Lower Crustal Layers Under Precambrian Regions〈/a〉〈br〉 (Jones, A. G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0056.pdf"〉Spherical-Earth Gravity and Magnetic Anomaly Modeling by Gauss-Legendre Quadrature Integration〈/a〉〈br〉 (Frese, R. R. B., Hinze, W. J., Braile, L. W., Luca, A. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0057.pdf"〉Detection Probabilities for Earthquakes in Sweden〈/a〉〈br〉 (Shapira, A., Kulhánek, O., Wahlström, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0058.pdf"〉The Geocyclotron Revisited: Potentialities of Modulated Wave Injection〈/a〉〈br〉 (Brinca, A. L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0059.pdf"〉Eine kleine Historie zur Namengebung der Fachdisziplin Geophysik〈/a〉〈br〉 (Buntebarth, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0060.pdf"〉〈i〉Correction〈/i〉: High Precision Measurement of the Frequency of Mode 〈sub〉0〈/sub〉S〈sub〉0〈/sub〉〈/a〉〈br〉 (Zürn, W., Knopoff, L., Rydelek, P. A.)〈/a〉〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DFG, SUB Göttingen
    Keywords: 550 ; Aeronomy ; Aurora ; Canada ; Electromagnetism ; Geomagnetism ; Geomagnetismus ; Geophysics ; Geophysik ; Himalaya ; India ; Ionosphere ; Ionosphäre ; Italy ; Lithosphere ; Lithosphäre ; Magnetotellurics ; Magnetotellurik ; Moon ; Morocco ; Palaeomagnetism ; Paläomagnetismus ; Rock Magnetism ; Seismology ; Seismologie ; Siberia ; Waves ; Wellen ; FID-GEO-DE-7
    Language: German , English
    Type: anthology_digi
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    CITATION GEO-LEO
  • 4
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    Unknown
    Journal of Geophysics - Zeitschrift für Geophysik 41 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148:41
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 58 Artikel zu Themengebieten der Seismologie, Erdmagnetismus und Gesteinsphysik veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1975.
    Description: Inhaltsverzeichnis: Journal of Geophysics 41 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0011.pdf"〉Statistical Behaviour of Elastic Waves in a Reverberating Solid〈/a〉〈br〉 (Drisler, J., Antony-Spies, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0013.pdf"〉A Compressed Air Gun Accelerator for Shock Magnetization and Demagnetization Experiments up to 20 kbar〈/a〉〈br〉 (Hornemann, U., Pohl, J., Bleil, U.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0014.pdf"〉Shock Magnetization and Demagnetization of Basalt by Transient Stress up to 10 kbar〈/a〉〈br〉 (Pohl, J., Bleil, U., Hornemann, U.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0015.pdf"〉K-Ar-Altersbestimmungen an Vulkaniten bekannter paläomagnetischer Feldrichtung〈/a〉〈br〉 (Todt, W., Lippolt, H. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0017.pdf"〉Dispersed Shots at Optimum Depth - An Efficient Seismic Source for Lithospheric Studies〈/a〉〈br〉 (Jacob, A. W. B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0018.pdf"〉Crustal Structure and 〈i〉P〈/i〉-Wave Travel Time Anomalies at NORSAR〈/a〉〈br〉 (Berteussen, K. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0019.pdf"〉Electromagnetic Induction in Three-Dimensional Structures〈/a〉〈br〉 (Weidelt, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0021.pdf"〉Acoustic Normal Modes Generated by Explosive Sources〈/a〉〈br〉 (Essen, H.-H., Kebe, H.-W., Siebert, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0022.pdf"〉Hydromagnetic Waves in a Non-Uniform Plasma〈/a〉〈br〉 (Kupfer, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0023.pdf"〉Time-Domain Electromagnetic INPUT Rresponse of a Conducting Horizontal Thin Sheet〈/a〉〈br〉 (Mallick, K., Jain, S. C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0024.pdf"〉〈i〉Book Reviews〈/i〉〈/a〉〈br〉 (Walk, O.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0025.pdf"〉Seismic Investigation along the Scandinavian "Blue Road" Traverse〈/a〉〈br〉 (Hirschleber, H. B., Lund, C.-E., Meissner, R., Vogel, A., Weinrebe, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0028.pdf"〉Computations of 〈i〉SV〈/i〉 Waves in Realistic Earth Models〈/a〉〈br〉 (Kind, R., Müller, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0030.pdf"〉On Tracing Seismic Rays with Specified End Points〈/a〉〈br〉 (Chander, Ramesh)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0031.pdf"〉Geothermal Models of the Ivrea-Zone〈/a〉〈br〉 (Höhndorf, A., Haenerl, R., Giesel, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0033.pdf"〉A Note on the Palaeomagnetism of the Late Precambrian Malani Rhyolites near Jodhpur - India〈/a〉〈br〉 (Klootwijk, C. T.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0035.pdf"〉An Evaluation Method Combining the Differential Doppler Measurements from Two Stations that Enables the Calculation of the Electron Content of the Ionosphere〈/a〉〈br〉 (Leitinger, R., Schmidt, G., Tauriainen, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0037.pdf"〉Measured and Calculated Secondary Electron Energy Spectra (20 - 1500 eV) above 120 km〈/a〉〈br〉 (Loidl, A., Schlegel, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0038.pdf"〉〈i〉Book Reviews〈/i〉〈/a〉〈br〉 (Mayer, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0039.pdf"〉The Behaviour of Minor Species in the Solar Wind〈/a〉〈br〉 (Ryan, J. M., Axford, W. I.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0040.pdf"〉The Effect of Low Energetic Electrons in the Polar Ionosphere〈/a〉〈br〉 (Hartmann, G. K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0041.pdf"〉Transmission of Electric Fields and Photoelectron Fluxes Between Conjugate Ionospheric F2-Regions〈/a〉〈br〉 (Petelski, E. F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0043.pdf"〉Characteristics of Azimuth Independent Optimum Velocity Filters Designed for Two-Dimensional Arrays〈/a〉〈br〉 (Hubral, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0045.pdf"〉Travel Time Residuals in the Iranian Plateau〈/a〉〈br〉 (Akasheh, B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0046.pdf"〉Noise Variance Fluctuations and Earthquake Detectability〈/a〉〈br〉 (Steinert, O., Husebye, S., Gjøystdal, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0048.pdf"〉An Electronic Filter and Damping System for the Askania Borehole Tiltmeter〈/a〉〈br〉 (Flach, D., Große-Brauckmann, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0049.pdf"〉Two-Dimensional Magnetotelluric Model Calculations for Overhanging, High-Resistivity Structures〈/a〉〈br〉 (Losecke, W., Müller, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0052.pdf"〉A New Type of Vertical Gravity Gradiometer〈/a〉〈br〉 (Groten, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0053.pdf"〉Letters to the Editors: Comment on Hydromagnetic Waves in a Non-Uniform Plasma by E. Kupfer〈/a〉〈br〉 (Siebert, M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0054.pdf"〉〈i〉Book Reviews〈/i〉〈/a〉〈br〉 (Wilhelm, H., Burkhardt, H., Strobach, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0055.pdf"〉Deep Structure of the Southern Rhinegraben Area from Seismic Refraction Investigations〈/a〉〈br〉 (Edel, J. B., Fuchs, K., Gelbke, C., Prodehl, C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0058.pdf"〉Faeroe Islands - a Microcontinental Fragment? 〈/a〉〈br〉 (Casten, U., Hedebol Nielsen, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0059.pdf"〉A Seismic Reflection Method for Solving Engineering Problems〈/a〉〈br〉 (Schepers, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0061.pdf"〉The Palaeomagnetism of Age Dated Tertiary Volcanites of the Monti Lessini (Northern Italy) and its Implication to the Rotation of Northern Italy〈/a〉〈br〉 (Soffel, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0064.pdf"〉Rock Magnetism of the Monti Lessini and Monte Berici Volcanites and Age of Volcanism Deduced from the Heirtzler Polarity Time Scale〈/a〉〈br〉 (Soffel, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0065.pdf"〉Supersonic Plasma Flow Between High Latitude Conjugate Ionospheres〈/a〉〈br〉 (Rösler, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0066.pdf"〉Crustal Structure of the Aegean Sea and the Hellenides Obtained from Geophysical Surveys〈/a〉〈br〉 (Makris, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0068.pdf"〉〈i〉Book Reviews〈/i〉〈/a〉〈br〉 (Neubauer, F. M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0069.pdf"〉Synthetic Seismograms of PS-Reflections from Transition Zones Computed with the Reflectivity Method〈/a〉〈br〉 (Fuchs, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0071.pdf"〉Explosions in Shallow Water for Deep Seismic Sounding Experiments〈/a〉〈br〉 (Burkhardt, H., Vees, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0073.pdf"〉Seegangserzwungene elastische Bewegungen des Nordseebodens〈/a〉〈br〉 (Janle, P., Rudloff, R., Schmalfeldt, B., Szelwis, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0077.pdf"〉Interpretation of a Gravity Profile Across the Southern Part of the Hon Graben, Libya〈/a〉〈br〉 (Soffel, H., Peters, K., Pohl, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0079.pdf"〉A Comparison of Methods for Computing Surface Densities of the Geopotential from Satellite Altimetry〈/a〉〈br〉 (Benning, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0080.pdf"〉An Economically Working Method for Computing the Gravimetric Terrain Correction〈/a〉〈br〉 (Boedecker, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0081.pdf"〉Pressure Dependence of Elastic Wave Characteristics of Ultramafic Rocks of India〈/a〉〈br〉 (Ramana, Y. V., Rao, M. V. M. S., Gogte, B. S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0082.pdf"〉Paleogravity - A Possible Chance for Determination of Paleo-Geographic North〈/a〉〈br〉 (Stegena, L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0083.pdf"〉Electromagnetic Induction at Dili, Portuguese Timor〈/a〉〈br〉 (Chamalaun, F. H., White, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0084.pdf"〉Preliminary Polar Wander Path of Central Iran〈/a〉〈br〉 (Soffel, H., Förster, H., Becker, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0085.pdf"〉Ein astasiertes Vertikalpendel mit tragender Blattfeder〈/a〉〈br〉 (Wielandt, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0086.pdf"〉〈i〉Book Reviews〈/i〉〈/a〉〈br〉 (Schneider, G., Suchy, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0087.pdf"〉Wave and Particle Observations by Explorer 45 Pertaining to Wave-Particle Interactions〈/a〉〈br〉 (Fritz, T. A., Williams, D. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0093.pdf"〉Probability Distribution of Earthquake Accelerations with Applications to Sites in the Northern Rhine Area, Central Europe〈/a〉〈br〉 (Ahorner, L., Rosenhauer, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0095.pdf"〉〈i〉P〈/i〉 Wave Amplitude Variability at NORSAR〈/a〉〈br〉 (Berteussen, K. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0096.pdf"〉Magnetic Hysteresis Loops and Magnetization Versus Temperature Curves of Some Basalt Samples Containing Titanomagnetite Ore either Single-Phase or with an Intergrowth of Ilmenite Lamellae〈/a〉〈br〉 (Schmidbauer, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0098.pdf"〉The Change of Isothermal Saturation Rremanent Magnetization of Basalts as a Result of Cyclic Elastic Deformation〈/a〉〈br〉 (Kapička, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0100.pdf"〉K-Ar-Altersbestimmungen an Vulkaniten bekannter paläomagnetischer Feldrichtung, II. Sachsen〈/a〉〈br〉 (Todt, W., Lippolt, H. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0102.pdf"〉An Anomaly of the Upper Mantle Below the Rhine Graben, Studied by the Inductive Response of Natural Electromagnetic Fields〈/a〉〈br〉 (Reitmayr, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0103.pdf"〉Some Problems of Large-Scale Gravity Interpretation〈/a〉〈br〉 (Groten, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0106.pdf"〉[Rezensionen] 〈/a〉〈br〉 (Haack, V., Höschele, K.)〈/a〉〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DFG, SUB Göttingen
    Keywords: 550 ; Aegan Sea ; Applied Geophysics ; Seismology ; Atlantic Ocean ; Electrical Conductivity Anomalies ; Crustal Structure ; Doppler Effect ; Earthquakes ; Electromagnetism ; Faeroe Islands ; Germany ; Gravimetrie ; Gravimetry ; Greece ; India ; Ionosphere ; Ionosphäre ; Iran ; Libya ; Magnetosphere ; Paleomagnetism ; Rock Magnetism ; Seismology ; Solar Wind ; Tiltmeter ; Elastic Wave ; Volcanics ; Waves ; Wellen ; FID-GEO-DE-7
    Language: German , English
    Type: anthology_digi
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    CITATION GEO-LEO
  • 5
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    Journal of Geophysics - Zeitschrift für Geophysik 43 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148:43
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 78 Artikel zu Themengebieten der Geophysik, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1977.
    Description: Inhaltsverzeichnis: Journal of Geophysics 43 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0012.pdf"〉Editors' Preface〈/a〉〈br〉 (Fuchs, K., Müller, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0013.pdf"〉Full Wave Theory Applied to a Discontinuous Velocity Increase: The Inner Core Boundary〈/a〉〈br〉 (Cormier, V. F., Richards, P. G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0016.pdf"〉Propagation of Elastic Waves in Vertically Inhomogeneous Media〈/a〉〈br〉 (Ungar, A., Ilan, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0017.pdf"〉Finite-Difference Modelling for P-Pulse Propagation in Elastic Media with Arbitrary Polygonal Surface〈/a〉〈br〉 (Ilan, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0020.pdf"〉Extension of Matrix Methods to Structures with Slightly Irregular Stratification〈/a〉〈br〉 (Cisternas, A., Jobert, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0021.pdf"〉Modal Approach to Wave Propagation in Layered Media with Lateral Inhomogeneities〈/a〉〈br〉 (Saastamoinen, P. R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0022.pdf"〉On the Propagation of Seismic Pulses in a Porous Elastic Solid〈/a〉〈br〉 (Mainardi, F., Servizi, G., Turchetti, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0023.pdf"〉Three-Dimensional Seismic Ray Tracing〈/a〉〈br〉 (Julian, B. R., Gubbins, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0025.pdf"〉On Geophysical Inverse Problems and Constraints〈/a〉〈br〉 (Sabatier, P. C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0027.pdf"〉On Impulse Response Data and the Uniqueness of the Inverse Problem〈/a〉〈br〉 (Barcilon, V.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0028.pdf"〉Least-Squares Collocation and the Gravitational Inverse Problem〈/a〉〈br〉 (Moritz, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0029.pdf"〉The Statistical Description and Interpretation of Geophysical Potential Fields Using Covariance Functions〈/a〉〈br〉 (Kautzleben, H., Harnisch, M., Schwahn, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0030.pdf"〉A Finite Element Program Package for Electromagnetic Modeling〈/a〉〈br〉 (Kaikkonen, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0032.pdf"〉Linear Inverse Problem in Gravity Profile Interpretation〈/a〉〈br〉 (Vigneresse, J. L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0034.pdf"〉Data Seizing and Information Processing〈/a〉〈br〉 (Picard, C. F., Sallantin, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0035.pdf"〉Formal Morphostructural Zoning of Mountain Territories〈/a〉〈br〉 (Alekseevskaya, M., Gabrielov, A., Gel’fand, I., Gvishiani, A., Rantsman, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0036.pdf"〉Three Dimensional Seismic Velocity Anomalies in the Lithosphere〈/a〉〈br〉 (Aki, Keiiti)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0038.pdf"〉The Inversion of Long Range Seismic Profiles〈/a〉〈br〉 (Kennett, B. L. N.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0040.pdf"〉An Oceanic Long Range Explosion Experiment〈/a〉〈br〉 (Orcutt, J. A., Dorman, L. M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0041.pdf"〉The Upper Mantle Under Western Europe Inferred from the Dispersion of Rayleigh Modes〈/a〉〈br〉 (Nolet, Guust)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0044.pdf"〉Global and Regional Phase Velocities of Long-Period Fundamental Mode Rayleigh Waves〈/a〉〈br〉 (Mitronovas, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0045.pdf"〉The Inversion of Surface Wave Dispersion Data with Random Errors〈/a〉〈br〉 (Knopoff, L., Chang, F.-S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0048.pdf"〉Finite Difference Calculation of Stress Relaxation Earthquake Models〈/a〉〈br〉 (Stöckl, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0050.pdf"〉On Equivalent Models of Seismic Sources〈/a〉〈br〉 (Jobert, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0051.pdf"〉A Method for Synthesis of the Seismic Coda of Local Earthquakes〈/a〉〈br〉 (Herrmann, R. B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0055.pdf"〉Application of Two-Timing Methods in Statistical Geophysics〈/a〉〈br〉 (Hasselmann, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0056.pdf"〉Scattered Waves in the Coda of P〈/a〉〈br〉 (Hudson, J. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0057.pdf"〉Elastic Wave Propagation in a Highly Scattering Medium – A Diffusion Approach〈/a〉〈br〉 (Dainty, A. M., Toksöz, M. N.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0058.pdf"〉Seismic Energy Transmission in an Intensively Scattering Environment〈/a〉〈br〉 (Nakamura, Yosio)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0060.pdf"〉Scattering of Rayleigh Waves by a Ridge〈/a〉〈br〉 (Sabina, F. J., Willis, J. R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0061.pdf"〉Mean-Field Electrodynamics and Dynamo Theory of the Earth's Magnetic Field〈/a〉〈br〉 (Krause, F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0064.pdf"〉An Example of Nonlinear Dynamo Action〈/a〉〈br〉 (Busse, F. H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0065.pdf"〉Energetics of the Earth's Core〈/a〉〈br〉 (Gubbins, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0066.pdf"〉Equation of State of Liquid Iron at the Earth's Core Conditions〈/a〉〈br〉 (Boschi, E., Mulargia, F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0067.pdf"〉Lithospheric Slab Penetration into the Lower Mantle beneath the Sea of Okhotsk〈/a〉〈br〉 (Jordan, T. H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0069.pdf"〉〈i〉Abstracts and Short Communications〈/i〉〈/a〉〈br〉〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0068.pdf"〉Phenomenological Representation of Seismic Sources〈/a〉〈br〉 (Backus, G., Mulcahy, M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0070.pdf"〉The Influence of the Core and the Oceans on the Chandler Wobble〈/a〉〈br〉 (Dahlen, F. A., Smith, M. L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0071.pdf"〉The Earth's Core-Mantle Interface Revisited〈/a〉〈br〉 (Hide, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0072.pdf"〉Seismic Observations of Structure and Physical Properties of the Subcrustal Lithosphere as Evidence for Dynamical Processes in the Upper Mantle〈/a〉〈br〉 (Fuchs, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0073.pdf"〉Seismic Anisotropy – a Summary〈/a〉〈br〉 (Crampin, Stuart)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0074.pdf"〉Precise Continuous Monitoring of Seismic Velocity Variations〈/a〉〈br〉 (Bungum, H., Risbo, T., Hjortenberg, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0075.pdf"〉On the Computation of Theoretical Seismograms for Multimode Surface Waves〈/a〉〈br〉 (Calcagnile, G., Panza, G. F., Schwab, F., Kausel, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0076.pdf"〉On the Excitation of the Earth's Seismic Normal Modes〈/a〉〈br〉 (Vlaar, N. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0077.pdf"〉Seismic Velocities and Density of an Attenuating Earth〈/a〉〈br〉 (Hart, R. S., Anderson, D. L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0078.pdf"〉A First-Motion Alternative to Geometrical Ray Theory〈/a〉〈br〉 (Chapman, C. H., Dey Sarkar, S. K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0079.pdf"〉Heterogeneous Velocity Structure at the Base of the Mantle〈/a〉〈br〉 (Snoke, J. A., Sacks, I. S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0080.pdf"〉Heterogeneous velocity structure at the base of the mantle〈/a〉〈br〉 (Sacks, I. S., Snoke, J. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0081.pdf"〉Theoretical Seismograms of Core Phases Calculated by a Frequency-Dependent Full Wave Theory, and Their Interpretation〈/a〉〈br〉 (Choy, G. L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0082.pdf"〉Amplitudes of Long-Period PcP, SKS and SKKS and the Structure at the Base of the Mantle and in the Outer Core〈/a〉〈br〉 (Müller, G., Kind, R., Mula, A., Gregersen, S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0083.pdf"〉Relative Errors in Group Velocity Measurements〈/a〉〈br〉 (Knopoff, L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0084.pdf"〉The Propagation of Plasma Waves in the Jovian Magnetosphere〈/a〉〈br〉 (Denskat, K. U., Neubauer, F. M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0085.pdf"〉Statistical Theory of Electromagnetic Induction in Thin Sheets〈/a〉〈br〉 (Treumann, R., Schäfer, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0086.pdf"〉Precursors to P' P' and Upper Mantle Discontinuities〈/a〉〈br〉 (Husebye, E. S., Haddon, R. A. W., King, D. W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0090.pdf"〉Mantle Heterogeneity and Mislocation Patterns for Seismic Networks〈/a〉〈br〉 (Vermeulen, J. M., Doornbos, D. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0093.pdf"〉Correlation Between Micro-Activity and Variation of Water Level at the Schlegeis-Reservoir〈/a〉〈br〉 (Blum, R., Bock, G., Fuchs, K., Merkler, G., Widmann, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0095.pdf"〉Attenuation Coefficients of Acoustic Normal Modes in Shallow Water〈/a〉〈br〉 (Essen, H.-H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0096.pdf"〉Relation of Gravity to Elevation in Zambia〈/a〉〈br〉 (Töpfer, K. D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0098.pdf"〉Albert Defant (1884 - 1974) 〈/a〉〈br〉 (Krauß, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0099.pdf"〉Study of the Structure of the Lower Lithosphere by Explosion Seismology in the USSR〈/a〉〈br〉 (Ryaboy, V. Z.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0102.pdf"〉P-Wave Amplitudes and Sources of Scattering in 〈i〉m〈/i〉〈sub〉b〈/sub〉-Observations〈/a〉〈br〉 (Ringdal, F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0104.pdf"〉Analyse von Mikroseismikmessungen auf Sylt〈/a〉〈br〉 (Szelwis, R., Janle, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0107.pdf"〉Improved Technique for Rapid Interpretation of Gravity Anomalies Caused by Two-Dimensional Sedimentary Basins〈/a〉〈br〉 (Töpfer, K. D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0109.pdf"〉Investigation of Isostasy by Computing the Correlation Coefficients between Elevations and Bouguer Anomalies〈/a〉〈br〉 (Janle, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0110.pdf"〉Geoelectrical Deep Soundings in Southern Africa Using the Cabora Bassa Power Line〈/a〉〈br〉 (Blohm, E. K., Worzyk, P., Scriba, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0112.pdf"〉Spectral Characteristics of Cross-Field and Two Stream Instability as Revealed by Rocket Borne Studies〈/a〉〈br〉 (Gupta, S. P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0113.pdf"〉〈i〉Short Communication〈/i〉 Observation of PS Reflections from the Moho〈/a〉〈br〉 (Jacob, A. W. B., Booth, D. C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0115.pdf"〉〈i〉Book Reviews〈/i〉〈/a〉〈br〉 (Makris, J., Weigel, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0116.pdf"〉Planetarische Dynamos〈/a〉〈br〉 (Stix, M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0117.pdf"〉〈i〉Original Investigations〈/i〉 A Note on the Post-Rosenbluth Quasilinear Diffusion Coefficient in the Ring Current Region〈/a〉〈br〉 (Treumann, R., Grafe, A., Lehmann, H.-R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0118.pdf"〉Remote Sensing Experiment for Magnetospheric Electric Fields Parallel to the Magnetic Field〈/a〉〈br〉 (Wilhelm, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0119.pdf"〉A Study of the Echzell/Wetterau Earthquake of November 4, 1975〈/a〉〈br〉 (Neugebauer, H. J., Tobias, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0121.pdf"〉Thermoelastic Deformations of a Half-Space – A Green's Function Approach〈/a〉〈br〉 (Müller, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0123.pdf"〉Gravity Variations with Time in Northern Iceland 1965–1975〈/a〉〈br〉 (Torge, W., Drewes, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0125.pdf"〉High Resolution Near Surface Reflection Measurements Using a Vertical Array Technique〈/a〉〈br〉 (Schepers, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0127.pdf"〉Ausbreitung von Rayleigh-Kanalwellen in Steinkohleflözen – Modellseismische Untersuchungen〈/a〉〈br〉 (Freystätter, S., Dresen, L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0129.pdf"〉Comment on: Hydromagnetic Waves in a Non-Uniform Plasma〈/a〉〈br〉 (Kupfer, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0130.pdf"〉〈i〉Book Reviews〈/i〉〈/a〉〈br〉 (Kisslinger, C., Klußmann, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0131.pdf"〉〈i〉Erratum〈/i〉 Full Wave Theory Applied to a Discontinuous Velocity Increase: The Inner Core Boundary〈/a〉〈br〉 (Cormier, V. F., Richards, P. G.)〈/a〉〈/li〉 〈/body〉 〈/html〉
    Description: Dynamo Theory
    Description: research
    Description: DFG, SUB Göttingen
    Keywords: 550 ; Africa ; Dynamo Theory ; Earthquakes ; Earth's Core ; Engineering Seismics ; Seismology ; Seismologie ; Geomagnetism ; Gravity ; Iceland ; Lithosphere ; Lithosphäre ; Magnetosphere ; Plasma Waves ; Seismic Waves ; Waves ; Wellen ; Geophysik ; Geophysics ; FID-GEO-DE-7
    Language: German , English
    Type: anthology_digi
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    Zeitschrift für Geophysik 36 / 5 (2019)
    Physika-Verlag, Würzburg
    In:  Herausgeberexemplar | 8 Z NAT 2148
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält Artikel zu Themengebieten der Geophysik, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1970.
    Description: 〈ul style="line-height:2;"〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0113.pdf"〉Heft 5〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0114.pdf"〉Titelseite〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0115.pdf"〉Inhaltsverzeichnis〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0116.pdf"〉[Impressum]〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0117.pdf"〉A Possible Scattering Mechanism for Lunar Seismic Waves (Berckhemer, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0119.pdf"〉On the Determination of Velocity Depth Distributions of Elastic Waves from the Dynamic Characteristics of the Reflected Wave Field (Fuchs, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0125.pdf"〉Auswertung seeseismischer Messungen mit einer digitalen Methode unter Anwendung der Theorie der Schallwellenausbreitung im Flachwasser (Kind, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0128.pdf"〉On Chemical Magnetization in Some Permian Lava Flows of Southern Norway (Storetvedt, K. M., Petersen, N.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0132.pdf"〉Auswertung von Gravimeter-Messungen in der Münchberger Gneismasse längs eines Profils von Konradsreuth nach Niederlamitz (Soffel, H., Peters, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0133.pdf"〉Deutung der Schwereanomalien im Nördlinger Ries (Kahle, H.-G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0135.pdf"〉Eine Methode zur direkten Bestimmung der sogenannten "Geometrischen Tortuosität" (Bitterlich, W., Wöbking, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0137.pdf"〉Observations With Synchronously-Offset Beams on a 77 km path at 1.8 and 4 cm (Jeske, H., Seehars, H. D., Pucher, G., Cassebaum, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0139.pdf"〉Scattering of Seismic Waves and Lunar Seismograms (Strobach, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0140.pdf"〉Berechnung eines Stromsystems in der Polaren E-Region (Czechowsky, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0141.pdf"〉Mitteilung〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0142.pdf"〉Buchbesprechungen (Zürn, W., Seiler, E., Theile, B., Diem, Walk, )〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0143.pdf"〉[Werbung]〈/a〉〈/li〉 〈/ul〉
    Description: research
    Description: DFG, SUB Göttingen, DGG
    Keywords: 550 ; Geophysik ; Erdmagnetismus ; Geomagnetismus ; Gravitation ; Gravimetrie ; Seismik ; Seismology ; Strahlung ; Wellen ; FID-GEO-DE-7
    Language: German , English
    Type: anthology_digi
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  • 7
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    Analysis of the source parameters behaviour during the Val D'Agri test-injection (Italy) (2019)
    Details
    Publication Date: 2019-03-27
    Description: Recent advances in understanding induced earthquake mechanics are due to the new and high-quality observations from seismic signals, natural faults and laboratory experiments. The synergy of different approaches allows the acquisition of useful observations to understand the earthquake source process. In this study we investigate the source parameters behaviour of induced earthquakes recorded during daily injection tests in a wastewater disposal well in Val D’Agri (VDA, Italy). We choose this area because of its complexity and particularity. VDA is a Quaternary extensional basin located in the Southern Apennines characterized by a complex tectonic evolution, high seismic hazard and significant hydrocarbon exploitation. The basin hosts the largest onshore oilfield in Europe that produces oil and associated gas from low- porosity, fractured Cretaceous limestone. Wastewater associated to hydrocarbon production is reinjected into the Costa Molina 2 high-rate well (CM2) into an unproductive marginal portion of the carbonate reservoir at 2890-3096 m depth (b.s.l.). Initial injection tests were performed from 2 to 12 June 2006 with variable duration (from 4 to 32 hr) and hourly injection rate of 38 m3/hr. During the tests a maximum well-head pressure of 101 bar was measured. These tests induced a swarm microseismicity (69 events, ML comprised by 0.3 and 1.8) recorded by a high-performance local network run by INGV (Mc 0.4, 23 stations) that constitutes our testing data-set. We investigate the full moment tensors decomposing them in Double-Couple (DC), Isotropic (ISO) and Compensated Linear Vector Dipole (CLVD) components by using HybridMT technique. We obtain significant contribution of %ISO and %CLVD components that tend to increase with time. Also, we compute the moment magnitudes (that we compare with ML) and the static stress drops (by spectral analysis). Finally, we discuss each analysed source parameter as a function of the injection pressure curve in the geological/tectonic contest.
    Description: Published
    Description: Malta
    Description: 3T. Sorgente sismica
    Keywords: Seismology ; Source Analysis ; Solid Hearth
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Poster session
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  • 8
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    AlpArray in Hungary: temporary and permanent seismological networks in the transition zone between the Eastern Alps and the Pannonian basin (2019)
    Details
    Publication Date: 2019-03-07
    Description: In the last few decades dense large-scale seismic networks showed their importance in studying the structure of the lithosphere and the upper mantle. The better understanding of the Apennines–Alps–Carpathian–Dinarides system is the main target of the AlpArray European international initiative in which more than 50 institutes are involved. The core of AlpArray is the AlpArray Seismic Network (AASN). With its 􏰖 600 broadband seismic stations ( 􏰖 280 of which are temporary) the AASN is, so far, the largest passive seismic experiment in Europe. The MTA CSFK Geodetic and Geophysical Insti- tute, as a Core Member of the AlpArray project, contributes to the AlpArray Seismic Network with its entire permanent network as well as with 11 temporary broadband seismic stations deployed in Western Hungary. Three additional station equipment were provided by the Swiss-AlpArray SINERGIA program. The average station distance together with the permanent stations is around 40 km in the area of interest. The temporary network has been installed between December 2015 and July 2016 and the planned operation period is 3 years. In this paper we describe the characteristics of the 29 per- manent and temporary stations, introducing not only the equipment, but the location, housing and geological setting, as well. We present median power spectral density curves in order to characterise the noise conditions at each station.
    Description: Hungarian Academy of Sciences (Grants EU-04/2014, EU-07/2015); Swiss-AlpArray SINERGIA Project CRSII2_154434/1 by the Swiss National Science Foundation (SNSF)
    Description: Published
    Description: 221–245
    Description: 1IT. Reti di monitoraggio
    Description: 5IT. Osservatori
    Description: JCR Journal
    Keywords: AlpArray ; Temporary seismic network ; Seismic noise ; Hungarian National Seismological Network ; Pannonian basin ; Solid Earth ; Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 9
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    Journal of Geophysics - Zeitschrift für Geophysik 59 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 32 Artikel zu Themengebieten der Geophysik, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1983.
    Description: Inhaltsverzeichnis: Journal of Geophysics 59 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0011.pdf"〉The detailed velocity structure of the Urach geothermal anomaly〈/a〉〈br〉 (Walther, C., Trappe, H., Meissner, R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0012.pdf"〉The effect of 〈i〉SKS〈/i〉 scattering on models of the shear velocity-structure of the D" region〈/a〉〈br〉 (Lay, T., Young, C.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0013.pdf"〉Spheroidal and torsional global response functions〈/a〉〈br〉 (Wilhelm, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0014.pdf"〉Magnetometer array studies on southeastern Finland on the Baltic shield〈/a〉〈br〉 (Pajunpää, K.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0016.pdf"〉Magnetovariational and magnetotelluric studies of the Oulu anomaly on the Baltic Shield in Finland〈/a〉〈br〉 (Korja, T., Zhang, P., Pajunpää, K.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0018.pdf"〉Glacio-isostatic adjustment in Fennoscandia revisited〈/a〉〈br〉 (Wolf, D.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0019.pdf"〉Modelling active audio-magnetotelluric data〈/a〉〈br〉 (Fischer, G., Schnegg, P.-A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0020.pdf"〉A comparison of upper mantle subcontinental electrical conductivity for North America, Europe, and Asia〈/a〉〈br〉 (Campbell, W. H., Schiffmacher, E. R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0021.pdf"〉Paleomagnetism of the tertiary intrusives from Chalkidiki (northern Greece)〈/a〉〈br〉 (Kondopoulou, D., Westphal, M.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0022.pdf"〉Absolute intensity of daytime whistlers at low and middle latitudes and its latitudinal variation〈/a〉〈br〉 (Hayakawa, M., Tanaka, Y., Ohta, K., Okada, T.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0023.pdf"〉Electric fields and currents at the Harang discontinuity: a case study〈/a〉〈br〉 (Kunkel, T., Baumjohann, W., Untiedt, J., Greenwald, R. A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0024.pdf"〉〈i〉Erratum.〈/i〉 In-situ permeability from non-dilatational soil deformation caused by groundwater pumping – a case study〈/a〉〈br〉 (Kümpel, H.-J., Lohr, G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0025.pdf"〉Book reviews〈/a〉〈br〉 (Jentzsch, G., Jacoby, W.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0026.pdf"〉A conceptual model of core dynamics and the earth's magnetic field〈/a〉〈br〉 (Officer, C. B.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0027.pdf"〉Paleomagnetism of Miocene volcanism from South Syria〈/a〉〈br〉 (Roperch, P., Bonhommet, N.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0028.pdf"〉Periadriatic lineament in the Alps studied by magnetotellurics〈/a〉〈br〉 (Ádám, A., Duma, G., Gutdeutsch, R., Verő, J., Wallner, Á.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0031.pdf"〉Comparison of fault-plane solutions and moment tensors〈/a〉〈br〉 (Hinzen, K.-G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0032.pdf"〉A teleseismic study of the Upper Rhinegraben area: array mislocation diagram and 3-D velocity inversion〈/a〉〈br〉 (Granet, M.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0033.pdf"〉Interactive high-resolution polarization analysis of broad-band seismograms〈/a〉〈br〉 (Plešinger, A., Hellweg, M., Seidl, D.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0035.pdf"〉The relationship between the polarization of whistlers and their dispersion〈/a〉〈br〉 (Shimakura, S., Okada, T., Hayakawa, M., Tanaka, Y.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0036.pdf"〉A simple statistical model on the degree of interconnection on partially molten rocks〈/a〉〈br〉 (Schmeling, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0037.pdf"〉Book reviews〈/a〉〈br〉 (Hansen, C. J., Jentzsch, G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0038.pdf"〉Complete seismogram synthesis for transversely isotropic media〈/a〉〈br〉 (Mandal, B., Mitchell, B. J.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0039.pdf"〉The influence of a dilatant region in the Earth's crust on the Earth tide tilt and strain〈/a〉〈br〉 (Kirsch, R., Zschau, J.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0040.pdf"〉The influence at atmospheric loading on VLBI-experiments〈/a〉〈br〉 (Rabbel, W., Schuh, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0041.pdf"〉Discrete frequency inequalities for magnetotelluric impedances of one-dimensional conductors〈/a〉〈br〉 (Weidelt, P.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0042.pdf"〉Thermally stimulated currents in rocks〈/a〉〈br〉 (Dologlou-Revelioti, E., Varotsos, P.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0043.pdf"〉Magnetostratigraphy of Neogene equatorial Pacific pelagic sediments〈/a〉〈br〉 (Weinreich, N., Theyer, F.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0045.pdf"〉Deconvolution as a method for the separation of Pi2 pulsations from background field variations〈/a〉〈br〉 (Behrens, J., Glaßmeier, K.-H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0046.pdf"〉〈i〉Laudatio〈/i〉. Presentation of the Emil Wiechert Medal to Don L. Anderson, Pasadena〈/a〉〈br〉 (Soffel, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0047.pdf"〉〈i〉Correction〈/i〉. A comparison of upper mantle subcontinental electrical conductivity for North America, Europe and Asia〈/a〉〈br〉 (Campbell, W. H., Schiffmacher, E. R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0048.pdf"〉Book reviews〈/a〉〈br〉 (Kertz, W., Schwentek, H., Jacoby, W. R.)〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DGG, DFG, SUB Göttingen
    Keywords: 550 ; Geophysik ; Alps ; Broad-band seismology ; Deconvolution ; Deep Sea Drilling Project ; Deformation of earth’s surface ; Dilatancy ; Dynamo theory ; Earth currents ; Earth tides ; Earth’s core ; Earth’s crust ; Earth’s Mantle ; Electrical Conductivity of the Earth ; Electromagnetic Induction ; Fault plane solutions ; Free oscillations of earth ; Geomagnetic pulsations ; Geothermics ; Germany ; Global positioning ; Gräfenberg seismic array ; Greece ; Harang discontinuity ; Inverse problems ; lonospheric electric field ; lsostasy ; Magnetic field of earth ; Magnetometer array studies ; Magnetosphere ; Magnetostratigraphy ; Magnetotellurics ; Pacific ; Paleomagnetism ; Partial melts ; Polar ionosphere ; Polar magnetic substorms ; Rhinegraben ; Rock Physics ; Scandinavia ; Seismics ; Seismic Moment tensor ; Seismic wave propagation ; Seismology ; Synthetic seismograms ; Syria ; Very Long Baseline Interferometry ; Viscosity of earth’s mantle ; Whistlers ; FID-GEO-DE-7
    Language: English
    Type: anthology_digi
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  • 10
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    Zeitschrift für Geophysik 36 / 4 (2019)
    Physika-Verlag, Würzburg
    In:  Herausgeberexemplar | 8 Z NAT 2148
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält Artikel zu Themengebieten des Erdmagnetismus und der Ionosphäre, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1970.
    Description: 〈ul style="line-height:2;"〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0088.pdf"〉Heft 4〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0089.pdf"〉Titelseite〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0090.pdf"〉Inhaltsverzeichnis〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0091.pdf"〉[Impressum]〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0092.pdf"〉Geophysics and Germany, Men and Enterprises (Chapman, S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0093.pdf"〉Investigation of the Auroral Electrojet (Heinrich, H., Reimer, D., Siemann, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0095.pdf"〉Plasmamessungen im Polarlicht-Elektrojet und daraus erschlossene elektrische Felder (Kist, R., Spenner, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0097.pdf"〉Polarisationsmessungen an künstlichen Bariumwolken (Möller, G. F., Haser, L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0098.pdf"〉Der Forschungssatellit AZUR (Keppler, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0101.pdf"〉Crustal Structure of the Western United States from Seismic-Refraction Measurements in Comparison with Central European Results (Prodehl, C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0105.pdf"〉MARS 66. Eine Magnetbandapparatur für seismische Tiefensondierung (Berckheimer, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0109.pdf"〉Recordings with Askania Gravimeters Before and After Important Earthquakes (Kizawa, T.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0111.pdf"〉Ergänzung zu "In memoriam Otto Lucke" (Heft 6/1969, S. 6-8) (Fanselau, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0112.pdf"〉[Werbung]〈/a〉〈/li〉 〈/ul〉
    Description: research
    Description: DFG, SUB Göttingen, DGG
    Keywords: 550 ; Geophysik ; Erdmagnetismus ; Geomagnetismus ; Geophysik ; Ionosphäre ; Ionosphere ; Seismik ; Seismology ; Strahlung ; Wellen ; FID-GEO-DE-7
    Language: German , English
    Type: anthology_digi
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  • 11
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    Journal of Geophysics - Zeitschrift für Geophysik 40 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148:40
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 134 Artikel zu Themengebieten der Seismologie, Erdmagnetismus und Gesteinsphysik veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1974.
    Description: Inhaltsverzeichnis: Journal of Geophysics 40 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0010.pdf"〉Seegravimetrie〈/a〉〈br〉 (Fleischer, U.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0014.pdf"〉Statistical analysis of the pitch angle distribution of magnetospheric solar protons during geomagnetic activity〈/a〉〈br〉 (Scholer, M., Morfill, G., Hovestadt, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0016.pdf"〉Viscosity-depth-structure of different tectonic units and possible consequences for the upper part of converging plates〈/a〉〈br〉 (Meissner, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0017.pdf"〉Die Magnetisierung von Bohrkernen aus einem Serpentinit-Vorkommen bei Erbendorf (Oberpfalz) (Schult, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0018.pdf"〉Estimates of in situ thermal diffusivity of the Ore-Bearing Rocks in some drillholes in the Skellefte Field (N. Sweden) using the annual temperature wave〈/a〉〈br〉 (Parasnis, D. S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0019.pdf"〉Geophysical exploration for groundwater in the Lusaka District, Republic of Zambia〈/a〉〈br〉 (Töpfer, K.D., Legg, C. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0021.pdf"〉Neuere Versuche zum Dipol-Induktionsverfahren〈/a〉〈br〉 (Leppin, M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0022.pdf"〉A field evaluation of Caner's broad-band geomagnetic induction instrumentation〈/a〉〈br〉 (Dragert, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0025.pdf"〉Seismic noise at 2 Hz in Europe〈/a〉〈br〉 (Plešinger, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0026.pdf"〉Crustal structure under the Ionian Sea〈/a〉〈br〉 (Weigel, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0028.pdf"〉Heat-Flow Measurements in Swiss Lakes〈/a〉〈br〉 (Von Herzen, R. P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0029.pdf"〉Makroseismische Abschätzungen von Herdparametern österreichischer Erdbeben aus den Jahren 1905 - 1973〈/a〉〈br〉 (Franke, A., Gutdeutsch, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0030.pdf"〉Long range propagation of seismic energy in the lower lithosphere〈/a〉〈br〉 (Kind, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0033.pdf"〉Palaeomagnetism of tertiary volcanic rocks from the Ethiopian southern plateau and the Danakil Block〈/a〉〈br〉 (Schult, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0034.pdf"〉Calculation of the shape and position of the last closed field line boundary and the coordinates of the magnetopause neutral points in a theoretical magnetospheric field model〈/a〉〈br〉 (Voigt, G.-H.))〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0037.pdf"〉Doppler shift of auroral backscatter signals〈/a〉〈br〉 (Czechowsky, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0038.pdf"〉Spherical harmonic analysis of the DS-field during magnetic storms〈/a〉〈br〉 (Schreiber, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0041.pdf"〉Note on determining hourly mean values〈/a〉〈br〉 (Larsen, J. C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0042.pdf"〉Seismic observations in Germany of a 10 t explosion off Scotland〈/a〉〈br〉 (Bonjer, K.-P., Kaminski, W., Kind, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0044.pdf"〉A method to reduce the measuring time for spinner magnetometers〈/a〉〈br〉 (Hummervoll, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0045.pdf"〉Book Reviews〈/a〉〈br〉 (Mayer, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0046.pdf"〉Transverse plasma waves in the solar wind close to the proton gyrofrequency〈/a〉〈br〉 (Rehn, H. W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0047.pdf"〉Die magnetische Anomalie der Ivreazone〈/a〉〈br〉 (Albert, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0052.pdf"〉Second meeting of the European Geophysical Society〈/a〉〈br〉〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0053.pdf"〉On a high-frequency method for the measurement of susceptibilities and hysteresis losses of rocks and minerals between nitrogen temperature and 700 °C〈/a〉〈br〉 (Markert, H., Trissl, K.-H., Zimmermann, G. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0054.pdf"〉Kinetics of oxidation processes in titanomagnetites〈/a〉〈br〉 (Kropáček, V.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0056.pdf"〉Ultra sound absorption measurements in rock samples at low temperatures〈/a〉〈br〉 (Herminghaus, Ch., Berckhemer, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0058.pdf"〉Recordings with the Askania borehole tiltmeter (vertical pendulum) in the frequency range of earth's free oscillations〈/a〉〈br〉 (Flach, D., Große-Brauckmann, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0060.pdf"〉Heat flow measurements in northern Italy and heat flow maps of Europe〈/a〉〈br〉 (Haenel, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0062.pdf"〉Die Bestimmung der Transmissivität von Grundwasserleitern aus dem Einschwingverhalten des Brunnen-Grundwasserleitersystems〈/a〉〈br〉 (Krauss, I.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0063.pdf"〉Symposium on "Geomagnetic Anomalies, Rock Magnetism and Petrography"〈/a〉〈br〉 (Hahn, A., Hall, D. H., Dunlop, D. J., Kobayashi, Kazuo, Nomura, Masafumi, Lidiak, E. G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0090.pdf"〉The AEROS mission〈/a〉〈br〉 (Lämmerzahl, P., Bauer, S. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0091.pdf"〉The AEROS-EUV Spectrometer〈/a〉〈br〉 (Schmidtke, G., Schweizer, W., Knothe, M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0092.pdf"〉The retarding potential analyzer on AEROS-B〈/a〉〈br〉 (Spenner, K., Dumbs, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0094.pdf"〉Impedance probe. The AEROS-B electron density experiment〈/a〉〈br〉 (Neske, E., Kist, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0095.pdf"〉The AEROS neutral and ion mass-spectrometer〈/a〉〈br〉 (Krankowsky, D., Lämmerzahl, P., Bonner, F., Wieder, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0096.pdf"〉The neural atmosphere temperature experiment〈/a〉〈br〉 (Spencer, N. W., Pelz, D. T., Niemann, H. B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0097.pdf"〉Atmospheric drag analysis with the AEROS Satellite〈/a〉〈br〉 (Roemer, Max, Wulf-Mathies, Carsten)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0098.pdf"〉Electromagnetic reflections in salt deposits〈/a〉〈br〉 (Thierbach, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0100.pdf"〉The structure of the Ries crater from geoelectric depth soundings〈/a〉〈br〉 (Ernstson, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0102.pdf"〉Measurements of magnetic total field anomalies in the Hon Graben, Libya〈/a〉〈br〉 (Schult, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0103.pdf"〉Correction〈/a〉〈br〉〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0104.pdf"〉Book reviews〈/a〉〈br〉 (Theile, B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0105.pdf"〉Interplanetary magnetic fields and the propagation of cosmic rays〈/a〉〈br〉 (Wibberenz, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0106.pdf"〉Intensity and energy spectrum of electrons accelerated in the earth's bow shock〈/a〉〈br〉 (Anderson, K. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0107.pdf"〉Evidence from particle precipitation of two-way-convection in auroral latitudes〈/a〉〈br〉 (Hultqvist, B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0110.pdf"〉Investigation of electron dynamics in the magnetosphere with electron beams injected from sounding rockets〈/a〉〈br〉 (Winckler, J. R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0113.pdf"〉Cosmic ray electrons in the atmosphere〈/a〉〈br〉 (Fulks, G., Meyer, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0114.pdf"〉Cosmic rays underground and the interplanetary magnetic field〈/a〉〈br〉 (Regener, Victor H., Regener, Eric)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0115.pdf"〉Harmonic temperature waves in a horizontally layered medium〈/a〉〈br〉 (Mundry, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0118.pdf"〉No transform faults on the moon〈/a〉〈br〉 (Stegena, L., Bérczi, Sz.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0121.pdf"〉Dominating trends of the anomalies of the gravity and magnetic fields in NE France and SW Germany〈/a〉〈br〉 (Edel, J. B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0122.pdf"〉Book Reviews〈/a〉〈br〉 (Strobach, K., Petersen, Nikolai)〈/a〉〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DGG, DFG, SUB Göttingen
    Keywords: 550 ; Aeronomy ; AEROS (satellite) ; Africa ; Alps ; Applied Geophysics ; Aurora ; Austria ; Bow Shock of Earth ; Canada ; Cosmic Rays ; Crustal Structure ; Earthquakes ; Europe ; France ; Free Oscillation of Earth ; Geoelectrics ; Geomagnetic Anomalies ; Geomagnetic Deep Sounding ; Geomagnetic Secular Variation ; Geomagnetic Time Variations ; Gravity Anomalies ; Gravity ; Geothermics ; Germany ; Great Britain ; Heat Flow ; Hydrology ; Interplanetary Magnetic Field ; Ionian Sea ; Ionosphere ; Italy ; Lunar Seismology ; Lunar Tectonism ; Macquarie-Inseln ; Magnetosphere ; Mantle of Earth ; Marine Geophysics ; Pacific Ocean ; Paleomagnetism ; Particle Acceleration ; Plasma Waves ; Radio Waves ; Ries Crater ; Rock Magnetism ; Rock Physics ; Salt Deposits ; Seismic Deep Sounding ; Seismic Noise ; Seismic Refraction Measurements ; Seismic Wave Absorption ; Seismology ; Solar EUV Radiation ; Solar Wind ; Switzerland ; Tectonophysics ; Tiltmeter ; United States ; USSR ; Viscosity of Earth ; FID-GEO-DE-7
    Language: German , English
    Type: anthology_digi
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    Journal of Geophysics - Zeitschrift für Geophysik 51 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148:51
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 29 Artikel zu Themengebieten der Geophysik, insbesondere zu Aspekten des Erdmagnetismus und der Seismik, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1982.
    Description: Inhaltsverzeichnis: Journal of Geophysics 51 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0011.pdf"〉〈sup〉40〈/sup)Ar–〈sup〉39〈/sup〉Ar Ages of Rocks and Glasses from the Nördlinger Ries Crater and the Temperature History of Impact Breccias〈/a〉〈br〉 (Staudacher, T., Jessberger, E. K., Dominik, B., Kirsten, T., Schaeffer, O. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0012.pdf"〉Tectonic Inferences of Paleomagnetic Data from Some Mesozoic Formations in Central Iran〈/a〉〈br〉 (Wensink, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0013.pdf"〉Palaeomagnetic Results from Lower Paleozoic Diabases and Pillow Lavas from the Frankenwald Area (Northwestern Edge of the Bohemian Massif) 〈/a〉〈br〉 (Kim, In-Soo, Soffel, H. C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0014.pdf"〉Palaeomagnetism of Quaternary Volcanics of the East-Eifel, Germany〈/a〉〈br〉 (Böhnel, H., Kohnen, H., Negendank, J., Schmincke, H.-U.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0016.pdf"〉The Effect of Young Oceanic Regions on Frequencies and Damping of free Oscillations of the Earth〈/a〉〈br〉 (Roult, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0017.pdf"〉Altitude Characteristics of Radar Aurora as Seen by a 90-MHz Double-Altitude Radar System Operated at Karmaselga, Karelia〈/a〉〈br〉 (Timofeev, E., Miroshnikov, Y.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0018.pdf"〉Observations of Ionospheric and Field-Aligned Currents in the Late Afternoon Sector with Triad and the Scandinavian Magnetometer Array〈/a〉〈br〉 (Sulzbacher, H., Baumjohann, W., Potemra, T. A., Nielsen, E., Gustafsson, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0019.pdf"〉Adiabatic Invariant of the Non-Relativistic Particles in the Field of a Shock Wave〈/a〉〈br〉 (Chirkov, A. G., Khodjaev, S. D., Shatalov, S. D., Vasiliyev, V. N.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0020.pdf"〉Comparative Interpretation of Explosion Seismic Data〈/a〉〈br〉 (Ansorge, J., Prodehl, C., Bamford, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0022.pdf"〉The Intercept-Time Method – Possibilities and Limitations〈/a〉〈br〉 (Pavlenkova, N. I.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0025.pdf"〉Linearized Solutions of Kinematic Problems of Seismic Body Waves in Inhomogeneous Slightly Anisotropic Media〈/a〉〈br〉 (Červený, V., Jech, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0026.pdf"〉Source Parameters of Mine Tremors in the Eastern Part of the Ruhr-District (West-Germany) 〈/a〉〈br〉 (Hinzen, K.-G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0027.pdf"〉Ferromagnetic Resonance 〈I〉g〈/i〉-Factor Measurement on LUNA 20 Soil〈/a〉〈br〉 (Frait, Z., Cimbálníková, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0028.pdf"〉Observation of Guided ULF-Waves Correlated with Auroral Particle Precipitation Theoretically Explained by Negative Landau Damping〈/a〉〈br〉 (Klöcker, N.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0029.pdf"〉Ground – Satellite Correlative Study of a Giant Pulsation Event〈/a〉〈br〉 (Hillebrand, O., Münch, J., McPherron, R. L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0030.pdf"〉Average Diurnal Variations of the Intensity of Geomagnetic Pulsations in the Period Ranges of pc 2–pc 5 Observed at Fürstenfeldbruck During the Years 1960–1971〈/a〉〈br〉 (Korschunow, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0031.pdf"〉Dispersion Effect in Earth Tide Parameters? 〈/a〉〈br〉 (Wilhelm, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0032.pdf"〉Comments on “Palaeomagnetism of Upper Cretaceous Volcanics and Nubian Sandstones of Wadi Natash, SE Egypt and Implications for the Polar Wander Path for Africa in the Mesozoic”〈/a〉〈br〉 (Schult, A., Hussain, A. G., Soffel, H. C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0033.pdf"〉Book Reviews〈/a〉〈br〉 (Buntebarth, G., Stegena, L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0034.pdf"〉Amplitude study of the 〈i〉Pg〈/i〉 Phase〈/a〉〈br〉 (Banda, E., Deichmann, N., Braile, L. W., Ansorge, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0035.pdf"〉Analysis of Broad-Band Rayleigh Waves: A Possibility for Seismic Discrimination〈/a〉〈br〉 (Hanka, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0038.pdf"〉Shear Fracture Development and Seismic Regime in Pyrophyllite Specimens with Soft Inclusions〈/a〉〈br〉 (Sobolev, G., Rummel, F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0039.pdf"〉The Shape of the Geomagnetic Field Through the Last 8,500 Years Over Part of the Northern Hemisphere〈/a〉〈br〉 (Creer, K. M., Tucholka, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0040.pdf"〉The Induced Effects of Geomagnetic Variations in the Equatorial Region〈/a〉〈br〉 (Carlo, L., Singh, B. P., Rastogi, R. G., Agrarwal, A. K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0041.pdf"〉Parameter Trade-Off in One-Dimensional Magnetotelluric Modelling〈/a〉〈br〉 (Fischer, G., Le Quang, B. V.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0042.pdf"〉A Theory of Forced Magnetohydrodynamic Waves〈/a〉〈br〉 (Krummheuer, F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0043.pdf"〉Pi2 Magnetic Pulsations, Auroral Break-ups, and the Substorm Current Wedge: A Case Study〈/a〉〈br〉 (Pashin, A. B., Glaßmeier, K. H., Baumjohann, W., Raspopov, O. M., Yahnin, A. G., Opgenoorth, H. J., Pellinen, R. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0045.pdf"〉In Memoriam Haakon Brækken 14 April 1902 – 2 Juli 1982〈/a〉〈br〉 (Saxov, S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0046.pdf"〉Book Reviews〈/a〉〈br〉 (Jacoby, W. R., Jentzsch, G., Spohn, T., Engelhard, L., Christensen, U.)〈/a〉〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DFG, SUB Göttingen
    Keywords: 550 ; Aurora ; Geomagnetic Pulsations ; Paleomagnetism ; Paläomagnetismus ; Satellites ; Seismologie ; Seismology ; FID-GEO-DE-7
    Language: English
    Type: anthology_digi
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    CITATION GEO-LEO
  • 13
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    Unknown
    Journal of Geophysics - Zeitschrift für Geophysik 52 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148:52
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 33 Artikel zu Themengebieten der Geophysik, inklusive der Beiträge zu einem Symposium über "Plasma und Teilchen in der Magnetosphäre", veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1983.
    Description: Inhaltsverzeichnis: Journal of Geophysics 52 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0011.pdf"〉On Systematic Errors in Phase-Velocity Analysis〈/a〉〈br〉 (Wielandt, E., Schenk, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0012.pdf"〉The Upper Mantle Structure Under South-East Europe Derived from GRF Broadband Records of Greek Earthquakes〈/a〉〈br〉 (Rademacher, H, Odom, R. I., Kind, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0013.pdf"〉Seismic Velocities of Granulites from the Seiland Petrographic Province, N. Norway: Implications for Scandinavian Lower Continental Crust〈/a〉〈br〉 (Chroston, P. N., Evans, C. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0014.pdf"〉Inductive Coupling Between Idealized Conductors and Its Significance for the Geomagnetic Coast Effect〈/a〉〈br〉 (Wolf, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0015.pdf"〉VHF Radar Observations of Wind Velocities at the Arecibo Observatory〈/a〉〈br〉 (Röttger, J., Czechowsky, P., Rüster, R., Schmidt, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0016.pdf"〉Spatial Variations of Ionospheric Conductivity and Radar Auroral Amplitude in the Eastward Electrojet Region During Pre-Substorm Conditions〈/a〉〈br〉 (Uspensky, M. V., Pellinen, R. J., Baumjohann, W., Starkov, G. V., Nielsen, E., Sofko, G., Kaila, K. U.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0019.pdf"〉On the Dependence of Radar Aurora Amplitude on Ionospheric Electron Density〈/a〉〈br〉 (Starkov, G. V., Oksman, J., Uspensky, M. V., Kustov, A. V.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0020.pdf"〉A Possibility to Distinguish Between Ionospheric and Magnetospheric Origin of Low Latitude Magnetic Perturbations〈/a〉〈br〉 (Papamastorakis, I., Haerendel, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0021.pdf"〉An Analogue Model of the Geomagnetic Induction in the South Indian Ocean〈/a〉〈br〉 (Papamastorakis, I., Haerendel, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0022.pdf"〉Book Review〈/a〉〈br〉 (Klever, N.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0023.pdf"〉Investigations of the Internal Geomagnetic Field by Means of a Global Model of the Earth's Crust〈/a〉〈br〉 (Meyer, J., Hufen, J.-H., Sichert, M., Hahn, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0025.pdf"〉A Palaeointensity Method for Use with Highly Oxidised Basalts, and Application to Some Permian Volcanics〈/a〉〈br〉 (Senanayake, W. E., McElhinny, M. W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0027.pdf"〉Comparison of Errors in Local and Reference Estimates of the Magnetotelluric Impedance Tensor〈/a〉〈br〉 (Kröger, P., Micheel, H. J., Elsner, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0028.pdf"〉Discrete Chorus Emissions Recorded at Nainital〈/a〉〈br〉 (Khosa, P. N., Lalmani, Ahmad, M. M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0029.pdf"〉Evidence for Lamination in the Lower Continental Crust Beneath the Black Forest〈/a〉〈br〉 (Southwestern Germany) (Deichmann, N., Ansorge, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0030.pdf"〉FENNOLORA Recordings at NORSAR〈/a〉〈br〉 (Mereu, R. F., Mykkeltveit, S., Husebye, E. S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0032.pdf"〉Earth's Flattening Effect on the Tidal Forcing Field〈/a〉〈br〉 (Wilhelm, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0033.pdf"〉Some Results of Calibration Factor Determination of LaCoste and Romberg Gravity Meters (Model D) 〈/a〉〈br〉 (Götze, H.-J., Meurers, B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0034.pdf"〉Ocean Tides and Periodic Variations of the Earth's Rotation〈/a〉〈br〉 (Baader, H.-R., Brosche, P., Hövel, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0035.pdf"〉In Memoriam Anton Graf (1901–1981) 〈/a〉〈br〉 (Rosenbach, O., Gauthier, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0036.pdf"〉In Memoriam Jürgen Henning Illies March 14, 1924 – August 2, 1982〈/a〉〈br〉 (Fuchs, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0037.pdf"〉Book Reviews〈/a〉〈br〉 (Spohn, T., Jacoby, W. R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0038.pdf"〉Preface to the special issue “Plasma and Energetic Particles in the Magnetosphere”, EGS Meeting, 23-27 Auguts 1982, Leeds, UK〈/a〉〈br〉 (Hovestadt, D., Untiedt, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0039.pdf"〉Global Pattern of Auroral Ion Precipitation: A Review of the Results from the AUREOLE-1 and AUREOLE-2 Satellites〈/a〉〈br〉 (Crasnier, J., Sauvaud, J. A., Cambou, F., Gladyshev, V. A., Kovrazhkin, R. A., Galperin, Yu. I.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0040.pdf"〉A Technique for Studying Density Gradients and Motions of Plasmaspheric Irregularities〈/a〉〈br〉 (Jones, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0041.pdf"〉Heavy Ion Plasmas in the Outer Magnetosphere〈/a〉〈br〉 (Young, D. T.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0042.pdf"〉Energetic Particle Signatures Near Magnetospheric Boundaries〈/a〉〈br〉 (Scholer, M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0043.pdf"〉Recent ISEE Observations of the Magnetopause and Low Latitude Boundary Layer: A Review〈/a〉〈br〉 (Saunders, M. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0044.pdf"〉Motion of Flux Transfer Events on 10 November 1977 Determined by Energetic Particles on ISEE 2〈/a〉〈br〉 (Daly, P. W., Keppler, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0045.pdf"〉On the Dynamics of the Ring Current〈/a〉〈br〉 (Hultqvist, B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0046.pdf"〉Ionic Composition of the Earth's Radiation Belts〈/a〉〈br〉 (Spjeldvik, W. N.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0047.pdf"〉Energy and Charge Distribution of Energetic Helium Ions in the Outer Radiation Belt of the Earth〈/a〉〈br〉 (Klecker, B., Hovestadt, D., Scholer, M., Gloeckler, G., Ipavich, F. M., Fan, C. Y.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0049.pdf"〉High Energy Electrons at Altitudes 500 km Near the Equator〈/a〉〈br〉 (Just, L., Kudela, K., Gusev, A. A., Pugacheva, G. I.)〈/a〉〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DFG, SUB Göttingen
    Keywords: 550 ; Aurora ; Black Forest ; Earth's Crust ; Geomagnetism ; India ; Magnetosphere ; Seismics ; Seismology ; FID-GEO-DE-7
    Language: English
    Type: anthology_digi
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    CITATION GEO-LEO
  • 14
    facet.materialart.
    Unknown
    Journal of Geophysics - Zeitschrift für Geophysik 56 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148:56
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 26 Artikel zu Themengebieten der Geophysik, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1985.
    Description: Inhaltsverzeichnis: Journal of Geophysics 56 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0010.pdf"〉Archaeomagnetic Study of Medieval Fireplaces at Mannheim-Wallstadt and Ovens from Herrenchiemsee (Southern Germany) and the Problem of Magnetic Refraction〈/a〉〈br〉 (Schurr, K., Becker, H., Soffel, H.C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0012.pdf"〉Frequency Dependence of 〈i〉Q〈/i〉 for Seismic Body Waves in the Earth's Mantle〈/a〉〈br〉 (Ulug, A., Berckhemer, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0013.pdf"〉The Polarization of S Waves in a Heterogeneous Isotropic Earth Model〈/a〉〈br〉 (Cormier, V. F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0014.pdf"〉The Relaxation of Spherical and Flat Maxwell Earth Models and Effects Due to the Presence of the Lithosphere〈/a〉〈br〉 (Wolf, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0015.pdf"〉Plasma-Gas Interactions in Planetary Atmospheres and Their Relevance for the Terrestrial Hydrogen Budget〈/a〉〈br〉 (Nass, H. U., Fahr, H. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0016.pdf"〉Increased Ionospheric Absorption Connected With Pc 1 Pulsations after Geomagnetic Storms〈/a〉〈br〉 (Märcz, F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0017.pdf"〉Some Aspects of Whistler Duct Lifetimes at Low Latitudes〈/a〉〈br〉 (Lalmani)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0018.pdf"〉On a Mixed Quadratic Invariant of the Magnetic Susceptibility Tensor〈/a〉〈br〉 (Jelinek, V.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0019.pdf"〉In Memoriam Hans Closs (1907 – 1982) 〈/a〉〈br〉 (Dürbaum, H.-J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0020.pdf"〉In Memoriam Herbert Flathe (1919 – 1983) 〈/a〉〈br〉 (Homilius, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0021.pdf"〉Book Reviews〈/a〉〈br〉 (Böhmel, H., Doan, D., Strobach, K., Jentzsch, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0022.pdf"〉Crustal Structure Beneath the Swabian Jura, SW Germany, from Seismic Refraction Investigations〈/a〉〈br〉 (Gajewski, D., Prodehl, C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0024.pdf"〉Static Deformations and Gravity Changes at the Earth's Surface Due to Atmospheric Loading〈/a〉〈br〉 (Rabbel, W., Zschau, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0026.pdf"〉The Normal Modes of a Uniform, Compressible Maxwell Half-Space〈/a〉〈br〉 (Wolf, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0027.pdf"〉Magnetic Expression of the Continent-Ocean Boundary Between the Western Margin of Australia and the Eastern Indian Ocean〈/a〉〈br〉 (Veevers, J. J., Tayton, J. W., Johnson, B. D., Hansen, L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0031.pdf"〉Domain State of Ti-Rich Titanomagnetites Deduced from Domain Structure Observations and Susceptibility Measurements〈/a〉〈br〉 (Appel, E., Soffel, H. C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0032.pdf"〉Large-Scale Studies of Pi-2's Associated with Auroral Breakups〈/a〉〈br〉 (Samson, J. C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0033.pdf"〉Book Reviews〈/a〉〈br〉 (Schröder,W., Engelhard, L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0034.pdf"〉Source Orientation from Grid Test and Synthetic Seismograms and an Application to the Ibbenbüren Earthquake of July 1981〈/a〉〈br〉 (Hinzen, K.-G., Krummel, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0035.pdf"〉Active Seismic Layers and Crustal Structure in Some Italian Regions〈/a〉〈br〉 (Cassinis, R., Mazzoni, P., Ranzoni, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0037.pdf"〉Nonlinear Inversion of Local Seismic Travel Times for the Simultaneous Determination of the 3D-Velocity Structure and Hypocentres – Application to the Seismic Zone Vrancea〈/a〉〈br〉 (Koch, M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0038.pdf"〉The Relationship Between the Magnetic Anisotropy and the 〈i〉c〈/i〉-Axis Fabric in a Massive Hematite Ore〈/a〉〈br〉 (Hrouda, F., Siemes, H., Herres, N., Hennig-Michaeli, C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0040.pdf"〉The Inverse Scattering Problem for Reflection of Electromagnetic Dipole Radiation From Earth With Vertical Variation〈/a〉〈br〉 (Vidberg, H. J., Riska, D. O.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0041.pdf"〉The Method of Integral Equation in the Direct Current Resistivity Method and its Accuracy〈/a〉〈br〉 (Schulz, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0042.pdf"〉Stochastic Ion Acceleration by Coherent Electrostatic Waves〈/a〉〈br〉 (Varvoglis, H., Papadopoulos, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0043.pdf"〉Book Reviews〈/a〉〈br〉 (Dieminger, W., Brüstle, W.)〈/a〉〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DFG, SUB Göttingen
    Keywords: 550 ; Aurora ; Earthquakes ; Earth's Crust ; Earth's Mantle ; Geomagnetic Pulsations ; Rock Magnetism ; Seismology ; Seismograms ; FID-GEO-DE-7
    Language: English
    Type: anthology_digi
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    NDARC NASA Design and Analysis of Rotorcraft - Input, Appendix 10 (2019)
    In:  CASI
    Details
    Publication Date: 2019-06-06
    Description: The NASA Design and Analysis of Rotorcraft (NDARC) software is an aircraft system analysis tool that supports both conceptual design efforts and technology impact assessments. The principal tasks are to design (or size) a rotorcraft to meet specified requirements, including vertical takeoff and landing (VTOL) operation, and then analyze the performance of the aircraft for a set of conditions. For broad and lasting utility, it is important that the code have the capability to model general rotorcraft configurations, and estimate the performance and weights of advanced rotor concepts. The architecture of the NDARC code accommodates configuration flexibility, a hierarchy of models, and ultimately multidisciplinary design, analysis, and optimization. Initially the software is implemented with low-fidelity models, typically appropriate for the conceptual design environment. An NDARC job consists of one or more cases, each case optionally performing design and analysis tasks. The design task involves sizing the rotorcraft to satisfy specified design conditions and missions. The analysis tasks can include off-design mission performance calculation, flight performance calculation for point operating conditions, and generation of subsystem or component performance maps. For analysis tasks, the aircraft description can come from the sizing task, from a previous case or a previous NDARC job, or be independently generated (typically the description of an existing aircraft). The aircraft consists of a set of components, including fuselage, rotors, wings, tails, and propulsion. For each component, attributes such as performance, drag, and weight can be calculated; and the aircraft attributes are obtained from the sum of the component attributes. Description and analysis of conventional rotorcraft configurations is facilitated, while retaining the capability to model novel and advanced concepts. Specific rotorcraft configurations considered are single-main-rotor and tail-rotor helicopter, tandem helicopter, coaxial helicopter, and tiltrotor. The architecture of the code accommodates addition of new or higher-fidelity attribute models for a component, as well as addition of new components.
    Keywords: Aircraft Design, Testing and Performance
    Type: NASA/TP–2015-218751 , ARC-E-DAA-TN67537
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    What Else to Do with an Army of Interns (2019)
    In:  CASI
    Details
    Publication Date: 2019-06-04
    Description: NASA Ames Research Center (ARC) Aeromechanics Branch hosted more than 60 interns this summer and focused their energies on studying the future of vertical flight. This is the second of two reports from this past years summer interns.
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN61467 , Vertiflite Magazine (ISSN 0042-4455); 14-15
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  • 17
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    LAVA Lattice Boltzmann Development/Application to Landing Gear (2019)
    In:  CASI
    Details
    Publication Date: 2019-05-31
    Description: No abstract available
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN41644
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  • 18
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    Discrete Lattice Material Vacuum Airship (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Vacuum airships fueled by renewable energy would reduce reliance on fossil fuel-based modes of transport, lessen the need for limited and non-renewable lifting gases, and can be achieved using novel manufacturing techniques for ultra-light, discrete lattice material systems.The Discrete Lattice Material Vacuum Airships (DLMVA) system combines novel material science and manufacturing technologies for new modes of mass transportation, resulting in a disruptive approach to reduce national resource consumption and emissions. Through the use of high performance building block elements, modular, scalable and extensible aircraft can be rapidly assembled into positive net-buoyancy systems utilizing a vacuum instead of a lifting gas. By using architected lattice material principles, show that lattice materials can overcome stability limitations of previous vacuum balloon designs. Additionally, we show that lattice vacuum balloons are strength limited, rather than stability limited. As a result,airborne infrastructure can be developed to support the proliferation of modern systems such as e-commerce and distributed communications, while simultaneously reducing dependence on finite, non-renewable, emission-heavy resources.
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN64902 , AIAA Science and Technology Forum and Exposition; Jan 07, 2019 - Jan 11, 2019; San Diego, CA; United States
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  • 19
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    A Detect and Avoid System in the Context of Multiple-Unmanned Aircraft Systems Operations (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-25
    Description: NASA's Unmanned Aircraft Systems Integration into the National Airspace System (UAS in the NAS) project examines the technical barriers associated with the operation of UAS in civil airspace. For UAS, the removal of the pilot from onboard the aircraft has eliminated the ability of the ground-based pilot in command (PIC) to use out-the-window visual information to make judgements about a potential threat of a loss of well clear with another aircraft. NASA's Phase 1 research supported the development of a Detect and Avoid (DAA) system that supports the ground-based pilot's ability to detect potential traffic conflicts and determine a resolution maneuver, but existing display/alerting requirements did not account for multiple UAS control (1:N). Demands for increased scalability of UAS in the NAS operations are expected to create a need for simultaneous control of UAs, and thus, a new DAA HMI design will likely be necessary. Previous research, however, has found performance degradations as the number of vehicles under operator control has increased. The purpose of the current human-in-the-loop (HITL) simulation was to examine the viability of 1:N operations with the Phase 1 DAA alerting and guidance. Sixteen UAS pilots flew three scenarios with varying number of UAs under their control (1:1, 1:3, 1:5). In addition to their supervisory and sensor mission responsibilities, pilots were to utilize the DAA system to remain DAA well clear (DWC) during scripted conflicts of mixed severity. Measured response times, separation performance, mission task data, and subjective feedback were collected to assess how the multi-UAS control configuration impacted pilots' ability to maintain DAA well clear and perform the mission tasks. Overall, the DAA system proved surprisingly adaptive to multi-UAS control for preventing losses of DAA well clear (LoDWC). The findings suggest that, while multi-UAS operators are able to maintain safe separation (DWC) from other traffic, their ability to efficiently perform missions drastically decreases with their number of controlled vehicles. Pilot feedback indicated that, for this context, the use of automation support tools for completing and managing mission tasks would be appropriate and desired, especially for ensuring efficient use of assets. Finally, human-machine interface (HMI) design considerations for multi-UAS operations are discussed.
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN69010 , AIAA Aviation Forum 2019; Jun 17, 2019 - Jun 21, 2019; Dallas, TX; United States
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    Uncertainty Quantification of a Rotorcraft Conceptual Sizing Toolsuite (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: A computational framework to support the quantification of system uncertainties and sensitivities for rotorcraft applications is presented using the NASA Design and Analysis of Rotorcraft (NDARC) conceptual sizing tool. A 90 passenger conceptual tiltrotor configuration was used for case demonstration in the modeling of uncertainties in NDARCs emission module. A non-intrusive forward propagation uncertainty quantification approach was applied to ensemble simulations using a Monte Carlo methodology with stratified Latin hypercube sampling. An off-the-shelf software, DAKOTA, which supports trade studies and design space exploration, including optimization, surrogate modeling and uncertainty analysis was used to address the research goals. A toolsuite was further developed incorporating DAKOTA with automated design processes and methods using function wrappers to execute program routines including support for data post-processing. Uncertainties in rotorcraft emissions modeling using the Average Temperature Response metric for a set mission profile were studied. It was shown that for the current study, using the base-line best estimate modeling parameters for the Average Temperature Response metric, NDARC under-estimates the effects of emissions when compared with results from Monte Carlo simulations. A global sensitivity analysis was further undertaken to quantify the contribution of the various emission species on output sensitivity, hence uncertainty. The work demonstrates that the developed toolsuite is robust and will support the quantification of system uncertainties and sensitivities in future rotorcraft design efforts.
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN64160 , 2019 AIAA SciTech Forum; Jan 07, 2019 - Jan 11, 2019; San Diego, CA; United States
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    The Making of a MAD MUTT: the X-56A Multi-Utility Technology Testbed Aircraft (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: This presentation is an overview of research being conducted by NASA and the AFRL, including recent successes and failures.
    Keywords: Aircraft Design, Testing and Performance
    Type: AFRC-E-DAA-TN67259 , AIAA Region VI Student Conference; Apr 04, 2019; San Luis Obispo, CA; United States
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    Evaluation of Ultem 1000, 1010, and 9085 for Radome Applications at 24.5 GHz (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-19
    Description: The UAS in the NAS project Flight Test 6 (FT6) campaign scheduled for FY19Q3 will evaluate the proficiency of a Honeywell DAPA-Lite Radar installed on a Tiger Shark unmanned vehicle to detect the presence of air traffic operating in its vicinity. A 3D printed radome will be manufactured for the front of the Tiger Shark to enclose the radar during FT6 operations. The DAPA-Lite radar operates in the 24.5 GHz frequency band. Material properties of 3D printer filaments are widely available for the mechanical and thermal properties, but limited knowledge exists on the electrical properties for radome applications and no data was found to correspond at the 24.5 Ghz frequency band. To minimize project risk associated with the radome performance, transmissivity and reflectivity measurements were conducted on two candidate 3D printed dielectric material filaments (Ultem 1010 Natural and Ultem 9085 Black) and two thicknesses of a solid laminate (Ultem 1000) material. The 3D printed Ultem coupons were tested shortly after being printed and again 8 months later to examine ageing effects of the open cell structure. This paper presents the transmissivity and reflectivity measurement results collected on the Ultem coupons and concludes the 3D printed 1010 Natural coupon is a suitable candidate filament for radome applications at 24.5 GHz. The design of the structures open cell matrix has a significant impact on the materials surface reflectivity.
    Keywords: Aircraft Design, Testing and Performance
    Type: NF1676L-33377 , NASA/TM-2019-220287 , L-21031
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    Field Evaluations of Sampling, Interviewing, and Flight Tracking of NASA's Low Boom Flight Demonstrator Aircraft (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The first years effort identified sampling and interviewing as the principal risks to assessment of prompt reactions to overflights producing low-amplitude sonic booms. It also 1) established the utility of geo-information system-based route planning for LBFD flight missions, 2) developed and demonstrated a prototype of a geographically-distributed, Internet-enabled instrumentation system capable of wide-area tracking of LBFD aircraft in near-real time. The latter system permits synchronizing the conduct of interviews in multiple overflown communities with arrival times of shock waves at interviewing sites; and of measuring, archiving, and processing their acoustic signatures. Means were also recommended for constructing representative, telephone-based samples of eligible respondents living in households within carpet boom corridors adjacent to LBFD flight tracks, and for conducting interviews with cross-sectional (independent) samples of such respondents about their prompt reactions to exposure to low-amplitude sonic booms. A detailed study design was prepared and accepted by NASA for a set of single-contact attempt telephone interviews with a nationally representative sample of households. The study design focused on testing automated and live agent interview completion rates obtainable without callbacks. A minimal (two monitoring station) version of the aircraft tracking system was built and installed near a civil airport in a successful demonstration of the systems ability to detect and track aircraft movements. The field exercise also demonstrated the ability of the system to capture the acoustic emissions of departing aircraft, and to serve aircraft position and sound level information to remote, geographically-distributed analysts in near-real time. Upon approval of OMB and IRB of the detailed study plan, a stratified, nationally representative sample of landline and wireless telephone-subscribing households was constructed. A total of 12,734 telephone interview contact attempts of the sort required by a straightforward cross-sectional study design were then made. These contact attempts demonstrated the impracticality of conducting a time-critical, cross-sectional study of prompt community response to low-amplitude sonic booms by means of independent (single contact attempt per respondent for each LBFD flight mission) telephone samples of respondents. The observed interview completion rates for these single telephone contact attempts were so low (~ 1% to 3% for automated and live agent interviews, respectively) that: 1) the representativeness of collected opinions would be susceptible to intuitive challenge as inadequate, even absent conclusive evidence of non-representativeness. Refuting challenges to representativeness would have to demonstrate that the composition of the actual sample did not differ from that of the target population, a task that is tantamount to proving a negative; 2) the information required to refute allegations of non-representativeness would require a questionnaire considerably lengthier than that required simply to determine the prevalence of boom-induced startle and annoyance. Such a questionnaire would have to inquire about potentially sensitive and intrusive matters, including respondents age, gender, education, employment, home ownership, income, ethnicity, family size, and other demographic factors; and 3) unreasonable numbers of attempts would be required to re-contact households with unsuccessful initial contact attempts, given the limited time available for doing so. For example, if about 500 completed interviews were desired in a supersonically overflown community, approximately 50,000 automated interview attempts would have to be made within ten to fifteen minutes of each LBFD overflight. Such large numbers of contact attempts could well exceed the numbers of households available for interview in areas of similar boom exposure levels in some communities near LBFD flight tracks. Such large numbers of interviews could be cost-effectively undertaken only by means of automated (i.e., outgoing interactive voice response) interviewing, a data collection method ill-suited for complex and sensitive questionnaire items. The infeasibility of independent sampling for evaluating prompt responses to LBFD overflights in a cross-sectional study is due in large part to simple non-response: that is, potential respondents particularly those contacted on wireless telephones refusing to answer calls with unfamiliar caller IDs. It is also due in part, however, to 1) the lack of time to attempt to contact the same respondent more than once within a few minutes after the arrival of a shock wave at the respondents location; and 2) the need to place calls during weekday/daytime hours, when response rates are notably lower than during evenings and weekends. Despite the poor interview completion rates achieved under the above constraints, cross sectional assessments of delayed reactions to LBFD overflights could still be feasible, if multiple attempts could be made to contact respondents during evening and weekend time periods, over extended time periods. Detailed plans for a longitudinal (panel) sample were developed as an alternative to a cross sectional sample design.
    Keywords: Aircraft Design, Testing and Performance
    Type: NASA/CR-2019-22057 , NF1676L-32312
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    Aeroelastic Stability Analysis of a Full-Scale Isolated Proprotor on the Tiltrotor Test Rig (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: A full-scale isolated proprotor test was recently conducted in the USAF National Full-Scale Aerodynamics Complex (NFAC) 40- by 80-Foot Wind Tunnel at NASA Ames. The test article was a 3-bladed research rotor derived from the right-hand rotor of the AW609. For this test, the NASA Tiltrotor Test Rig (TTR) and rotor were installed in the 40- by 80-Foot Wind Tunnel. This paper covers the analyses and testing done to prepare for a safe entry. Included are brief descriptions of the following: NASTRAN models of the TTR, ground vibration tests of the TTR (and resulting modal data), loads analyses, and stability predictions using the comprehensive analysis CAMRAD II. The evolution of these analyses from early in the TTR program until the initiation of actual testing is also discussed. The intent is to show how all of these efforts were integrated to ensure a successful test. This paper includes stability predictions based on NASTRAN modal data and worst-case damping test data. The stability predictions covered all test conditions: hover, cruise (airplane mode), conversion, and helicopter mode. The predictions showed that the TTR and rotor are stable within the test envelope.
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN63432 , AIAA Science and Technology Forum and Exposition; Jan 07, 2019 - Jan 11, 2019; San Diego, CA; United States
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    Effect of Grazing Flow on Grooved Over-the-Rotor Acoustic Casing Treatments (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: After testing grooved over-the-rotor acoustic casing treatments on a turbofan rotor, a follow-on study was performed to investigate the effect of flow on grooved acoustic liners. The experiment was performed to understand the scaling of acoustic liner absorption with grazing flow and investigate a potential noise source from grooved acoustic liners. Acoustic liner absorption and reflection characteristics were quantified by examining the reduction in amplitude of a plane wave traveling over 2 inch liners with grazing flow. For all liners tested, as the grazing flow Mach number is increased, the absorption curves broadened and the frequency of peak absorption decreased. Grazing flow over a series of grooves was found to generate resonances up to 152 dB sound pressure level. Adding acoustic treatment to the bottom of these grooves was found to reduce the magnitude of this resonance by up to 10 dB sound pressure level and increase its frequency by up to 10%. The quantification of the grazing flow effect and identification of a mechanism behind the noise penalty from the prior turbofan rotor experiment will aid in the design of future over-the-rotor treatments.
    Keywords: Aircraft Design, Testing and Performance
    Type: GRC-E-DAA-TN67974 , AIAA/CEAS Aeroacoustics Conference; May 20, 2019 - May 23, 2019; Delft; Netherlands
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    Balloon Thermal Model Design Parameters and Sensitivities (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: This presentation covers recent process improvements regarding environmental parameters, w.r.t convection, and future plans for thermal models.
    Keywords: Aircraft Design, Testing and Performance
    Type: GSFC-E-DAA-TN68948 , 2019 Scientific Ballooning Technologies Workshop; May 14, 2019 - May 16, 2019; Minneapolis, MN; United States
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    CSBF Requirements & Recommendations for Balloon Gondola Design (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Presentation will cover new high level requirement changes for gondolas launched by Columbia Scientific Balloon Facility (CSBF), and discuss recommendations for the design and design process.
    Keywords: Aircraft Design, Testing and Performance
    Type: GSFC-E-DAA-TN68680 , 2019 Scientific Ballooning Technologies Workshop; May 14, 2019 - May 16, 2019; Minneapolis, MN; United States
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    Aero-Structural Modeling of the Truss-Braced Wing Aircraft Using Potential Method with Correction Methods for Transonic Viscous Flow and Wing-Strut Interference Aerodynamics (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-27
    Description: This paper describes an aero-structural modeling method for the Transonic Truss-Braced Wing (TTBW) aircraft using VSPAERO. A vortex-lattice model of the TTBW aircraft is developed, and a transonic and viscous flow correction method is implemented in the VSPAERO models to account for transonic and viscous flow effects. A correction method for the wing-strut interference aerodynamics is developed and applied to the VSPAERO solver. Also, a structural dynamic finite-element model of the TTBW aircraft is developed. This finite-element model includes the geometric nonlinear effect due to the tension in the struts which cause a deflection dependent nonlinear stiffness. The VSPAERO models are coupled to the finite-element model to provide a rapid capability for aero-structural modeling and flutter analysis. A flight-optimized jig twist model is being developed and will be applied for the purpose of generating a full flight dynamic model of the TTBW aircraft.
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN69149 , Aviation Forum; Jun 17, 2019 - Jun 21, 2019; Dallas, TX; United States
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    PRANDTL-3c Operations and Flight Testing (2019)
    In:  CASI
    Details
    Publication Date: 2019-08-17
    Description: This student poster describes their experiences during the current intern period.
    Keywords: Aircraft Design, Testing and Performance
    Type: AFRC-E-DAA-TN71270
    Format: application/pdf
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    Development of a Maxwell X-57 High Lift Motor Reference Design (2019)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: NASA's all-electric X-57 airplane will utilize 14 electric motors, of which 12 are exclusively for lift augmentation during takeoff and landing. This report covers the design and development process taken to create an open reference model representative of the 12 lift augmenting motors. A combined worst case scenario was used as the design point, which represents the simultaneously occurring worst case aspects of thermal, static stress, electromagnetic, and rotor dynamic conditions. This work also highlights the tightly coupled nature of aerospace electric motor design, requiring constant iteration between all disciplines involved. Further adding to the uniqueness is the cooling method, which is limited to nacelle skin forced convection cooling only, no internal air flow is permitted. The stator outer diameter limit of 156.45 mm greatly impacts the degree of coupling between the electromagnetic design with the thermal analysis. The permanent magnet synchronous motor developed here operates between 385 V and 538 V, at a peak current of 50 A. Detailed electromagnetic, thermal, static load, and rotordynamic analysis was completed for this electric motor; all of which are required for a full design. The rotordynamic analysis took into consideration the motor housing which is designed specifically for this motor. The final electric motor has a mass of 2.34 kg, produces 24.1 Nm of torque with a specific power of 5.56 kW/kg, and has an efficiency of 96.61% at the combined worst case design point.
    Keywords: Aircraft Design, Testing and Performance
    Type: GRC-E-DAA-TN71034 , AIAA/IEEE Electric Aircraft Technologies Symposium; Aug 22, 2019 - Aug 24, 2019; Indianapolis, IN; United States
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    Update to ACTE II TechPort Web Page (2019)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Adding an ACTE II (Adaptive Compliant Trailing Edge II) closeout summary to the ACTE II TechPort page.
    Keywords: Aircraft Design, Testing and Performance
    Type: HQ-E-DAA-TN68391
    Format: application/pdf
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    Design of P-3 Nadir Port (2019)
    In:  CASI
    Details
    Publication Date: 2019-09-18
    Description: This project details the design and analysis of a structure to replace the interface of the P-3B nadir port with an optimized interface for science installations. A new nadir port plug has been designed to replace the OEM (Original Equipment Manufacturer) plug (Lockheed PN 910169) currently used in Nadir ports 1 and 2 on the NASA P-3B aircraft. The plug consists of a milled frame that can be outfitted with customizable flat plates to meet a broad range of science needs. The frame slides into place using the existing P-3B rail system using a lever and tie-rod assembly. The seal interface will contact the Fuselage skin of the aircraft and consists of a bulb E-seal that is riveted around the perimeter of the frame. The flat plate (20 inches x 31 inches) provides a large profile that can be outfitted based on science mission goals and requirements to attach multiple instruments. This is a significant increase to the aircraft capability. Previously, the OEM plug had to be modified to hold very small plates, windows, or instruments limiting the use of the ports.There were several challenges for this project that included a constrained schedule, lack of historical references, and reverse engineering. The unusually tight schedule for design, manufacture, and install limited potential approaches. In addition, design of a new interface to replace the existing plug, on an aircraft designed in the 1960's by Lockheed for the Navy with little to no documentation, required substantial reverse engineering. In order to accomplish this, a suitable method to determine interface requirements with the aircraft had to be solved. After several iterations, the solution was to implement laser scanning techniques to scan the aircraft and the OEM plug and generate a 3D model to capture the design envelope. The structure is designed to maintain a positive margin of safety when subjected to the inertial, pressure, and aerodynamic load requirements for an external installation on the P-3B, as described in the Wallops' P-3B Design Requirements 548-RQMT-0001 Rev. A . A finite element model is created in FEMAP (Finite Element Modeling And Postprocessing) and is run through NX Nastran solver to analyze the structure. After several iterations of analysis, the structure was enveloped to hold 115 pounds evenly distributed on the plate.
    Keywords: Aircraft Design, Testing and Performance
    Type: GSFC-E-DAA-TN72505 , NASA Early Career Forum: Structures, Loads, and Mechanical Systems (SLaMS 2019); Sep 10, 2019 - Sep 13, 2019; Palmdale, CA; United States
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    Certification Rules and Standards Review (2019)
    In:  CASI
    Details
    Publication Date: 2019-11-28
    Description: This report characterizes the certification practices for electric propulsion systems by modeling changes to current engine and propeller certification practices (14 CFR 23, 33 and 35 and means of compliance in standards developed by ASTM Committee F39 and F44). Industry technology paths are varied, so this report focuses on insights from the NASA X-57 Maxwell Distributed Electric Propulsion flight demonstrator system technology project. There are 122 sections of the regulation reviewed, where 28 needed tailoring or revision. A second report will examine the regulations to the X-57 system development products. A final report will describe a general regulatory gaps method for new vehicle concepts.
    Keywords: Aircraft Design, Testing and Performance
    Type: NF1676L-34449 , NASA/CR−2019-220406
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    Demonstrating Next Generation High-Altitude, Long Endurance Aircraft for Earth Science (2019)
    In:  CASI
    Details
    Publication Date: 2019-10-12
    Description: This paper will address NASA activities to monitor and study Earth processes from long-duration unmanned aircraft systems (UAS). NASA is currently supporting both large and small UAS development and demonstration. In a follow-on to previous work, NASA Armstrong Flight Research Center is hosting test flights of a large AeroVironment solar-powered aircraft, while NASA Ames Research Center is supporting the demonstration of a light-weight solar powered aircraft by Swift Engineering. Both are designed for long duration, multi-day flight. NASA Earth Science and Aeronautics researchers have been involved in the development and use of High Altitude Long Endurance (HALE) UAS since the 1990's. The NASA Environmental Research Aircraft Sensor and Technology Program (ERAST) demonstrated the promise of HALE aircraft for providing observations while also proving the importance of triple-redundant avionics to improve system reliability for large unmanned aircraft. Early efforts to develop an operational HALE capability for earth observations languished for nearly two decades owing to insufficient solar panel efficiency, battery power density, and light-weight, yet strong, materials. During this time NASA researchers focused on using the Global Hawk to demonstrate the utility of providing diurnal measurements over severe storms (i.e. HS3) and to track stratospheric water vapor transport (ATTREX). Recent significant commercial investments are now leading to the realization of a long-held goal of week- to month-long sustained observations and measurements from the stratosphere. In addition to a historical review of NASA use and interest in HALE aircraft, this paper will present current concepts for exploiting current and planned HALE aircraft capabilities including in situ characterization of atmospheric composition and dynamics as well as imagery collection and internet connectivity. NASA researchers anticipate HALE will also provide a useful means to test smallsat instruments and components. Observations from HALE-based instruments might also provide useful gap-filler observations to flagship satellite missions where the repeat time doesn't allow for measurements of quickly changing phenomenon. HALE will likely also provide measurements and communications relay to facilitate other aircraft in multi-aircraft campaigns. We will also report on progress towards a NASA-supported flight tests solar electric vehicles planned for 2019. One is the Swift Engineering UAS designed to carry 7kg (15lbs) for 30 days at 20km altitude. The other is the AeroVironment Hawk 30, also designed for multi-day flight.
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN73765 , Pecora 21/ISRSE 38; Oct 06, 2019 - Oct 11, 2019; Baltimore, MD; United States
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    Baseline Assumptions and Future Research Areas for Urban Air Mobility Vehicles (2019)
    In:  CASI
    Details
    Publication Date: 2019-11-23
    Description: No abstract available
    Keywords: Aircraft Design, Testing and Performance
    Type: NF1676L-31660 , AIAA Aviation Forum; Jan 17, 2019 - Jan 21, 2019; Dallas, TX; United States
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    Using CFD to Develop NASA's X-57 Maxwell Flight Simulator (2019)
    In:  CASI
    Details
    Publication Date: 2019-12-21
    Description: No abstract available
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN75498 , International Conference for High Performance Computing, Networking, Storage, and Analysis (SC19); Nov 17, 2019 - Nov 22, 2019; Denver, CO; United States
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    CAMIEM: Compact Additively Manufactured Innovative Electric Motor (2019)
    In:  CASI
    Details
    Publication Date: 2020-01-21
    Description: New manufacturing methods are needed to obtain innovative electric motor designs that have much higher power densities and/or efficiencies compared to the current state-of-the-art. Additive manufacturing offers the potential to radically change motor designs so that they have compact designs, multi-material components, innovative cooling, and optimally designed and manufactured components. New component designs enabled by additive manufacturing technologies have been designed and were fabricated to include the housing, rotors, stator cooling ring, a direct printed stator, and a wire embedded stator. The new components were integrated into the motor and tested evaluate the performance gains in comparison to the baseline electric motor configuration. Partners on the sub-project include NASA GRC, NASA LaRC, NASA AFRC, LaunchPoint Technologies, and the University of Texas El Paso.
    Keywords: Aircraft Design, Testing and Performance
    Type: GRC-E-DAA-TN74521 , Convergent Aeronautics Solutions (CAS) Showcase ; Nov 13, 2019 - Nov 14, 2019; Orlando, FL; United States
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    Over-the-Rotor Liner Investigation via the NASA Langley Normal Incidence Tube (2019)
    In:  CASI
    Details
    Publication Date: 2020-01-10
    Description: NASA Langley and Glenn Research Centers have collaborated on the usage of acoustic liners mounted very near or directly over the rotor of turbofan aircraft engines. This collaboration began over a decade ago with the investigation of a metallic foam liner. Similar to conventional acoustic liner applications, this liner was designed to absorb sound generated by the rotor-alone and rotor-stator interaction sources within the fan duct. Given its proximity to the rotor tips, the expectation was that the liner would also serve as a pressure release and thereby inhibit the amount of noise generated. Initial acoustic results were promising, but there was concern regarding potential aerodynamic penalties. Nevertheless, there were sufficient positive results to warrant further investigation. To that end, the current report presents results obtained in the NASA Langley Normal Incidence Tube for 20 acoustic liner candidates for the OTR application. The majority contain grooves at their surface, designed to minimize aerodynamic penalties caused by placing the liner in close proximity to the fan rotor tips. The intent is to assess the acoustic properties of each liner configuration, and in particular to assess the effects of including the grooves on the overall acoustic performance. An additional intent of this paper is to provide documentation regarding recent enhancements to the NASA Langley Normal Incidence Tube.
    Keywords: Aircraft Design, Testing and Performance
    Type: NF1676L-35060 , NASA/TM–2019–220430
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    VIPER Integrated MDAO Analysis for Conceptual Design of Supersonic X-Plane Vehicles (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A streamlined Multi-Disciplinary Analysis and Optimization (MDAO) process is being developed to provide feedback on conceptual designs and early airspace modeling assessments of unconventional aircraft. This MDAO process has been demonstrated using a Low-Boom Flight Demonstrator (LBFD) like configuration by performing a trade study of various flap sizes. The results of this trade showed that shorter takeoff distances are achieved with increased flap chord and flap deflections. This trend is unlike conventional transport type aircraft which typically show increased required takeoff distances due to the increased drag during its take-off flap configurations. The LBFD like configuration results are attributed to its high engine thrust which overcomes the higher drag associated with these takeoff flap configurations.
    Keywords: Aircraft Design, Testing and Performance
    Type: NASA/TM—2019–220239 , ARC-E-DAA-TN59874
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    Loftid Aeroshell Engineering Development Unit Structural Testing (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: NASAs Hypersonic Inflatable Aerodynamic Decelerator (HIAD) technology was selected for a Technology Demonstration Mission under the Space Technology Mission Directorate in 2017. HIAD is an enabling technology that can facilitate atmospheric entry of heavy payloads to planets such as Earth and Mars using a deployable aeroshell. The deployable nature of the HIAD technology allows it to avoid the size constraints imposed on current rigid aeroshell entry systems. This enables use of larger aeroshells resulting in increased entry system performance (e.g. higher pay-load mass and/or volume, higher landing altitude at Mars). The Low Earth Orbit Flight Test of an Inflatable Decelerator (LOFTID) is currently scheduled for late-2021. LOFTID will be launched out of Vandenberg Air Force Base as a secondary payload on an Atlas V rocket. The flight test features a 6m diameter, 70-deg sphere-cone aeroshell and will provide invaluable high-energy orbital re-entry flight data. This data will be essential in supporting the HIAD team to mature the technology to diameters of 10m and greater. Aeroshells of this scale are applicable to potential near-term commercial applications and future NASA missions. Currently the LOFTID project has completed fabrication of the engineering design unit (EDU) inflatable structure (IS) and the flexible thermal protection system (F-TPS). These two components along with the rigid nose and center body comprise the HIAD aeroshell system. This EDU aeroshell is the precursor to the LOFTID aeroshell that will be used for flight. The EDU was built to verify the design given the subtle differences between the LOFTID aeroshell and past aeroshell designs that have been fabricated under the NASA HIAD project. To characterize the structural performance of the LOFTID aeroshell design, three structural tests will be performed. The first test to be conducted is static load testing, which will induce a uniform load across the forward surface of the aeroshell to simulate the expected pressure forces during atmospheric entry. The IS integrated with the rigid center body will first be tested alone to provide data for analytical model correlation, and then the F-TPS will be integrated for a second series of static load testing of the full aeroshell system. Instrumentation will be employed during the test series to measure component loads during testing, and a laser scanner will be used to generate a 3D map of the aeroshell surface to verify that the shape of the structure is acceptable at the simulated flight loads. After static load testing, pack and deployment testing will be conducted multiple times on the integrated system to demonstrate the aeroshells ability to fit within the required packed volume for the LOFTID mission without experiencing significant damage. Finally, the aeroshell will undergo modal testing to characterize its structural response. This presentation will discuss the setup and execution of each of the three tests that the EDU aeroshell will undergo. In addition, initial results of the testing will be presented outlining key findings as LOFTID moves for-ward with fabrication of the flight aeroshell.
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN66439 , International Planetary Probe Workshop; Jul 08, 2019 - Jul 12, 2019; Oxford; United Kingdom
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    Effect of Mass Transfer on Aeroheating in Hypersonic Chemically Reacting Boundary Layers (2019)
    In:  CASI
    Details
    Publication Date: 2019-12-17
    Description: Heat flux characterization of high-enthalpy boundary layer flows is key to optimize the performance and design of Thermal Protection System of next generation aerospace vehicles [1]. At atmospheric entry hypersonic speeds, ablation as well as surface catalycity impact boundary layer aeroheating. Out-gassing occurring from an ablative surface in planetary entry environment introduces a rich set of problems in thermodynamic, fluid dynamic, and material pyrolysis. Ablation leads to out-gassing and surface roughness, both of which are known to affect surface heating in hypersonic chemically reacting boundary layers via three main routes: gas blowing into the boundary layer from the wall, changing the surface heat transfer due to wall-flow chemical reactions, and modifying surface roughness via ablative processes.
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN76132 , American Physical Society's Division of Fluid Dynamics Annual Meeting; Nov 23, 2019 - Nov 26, 2019; Seattle, WA; United States
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    Certification Coordination Roadmap (2019)
    In:  CASI
    Details
    Publication Date: 2019-11-28
    Description: Innovative technology has to prove itself in the context of legacy regulations. The knowledgeable technologist must engage standards process and regulating authorities to understand their roles and to advise the effect of new technology, and with manufacturers to demonstrate technology benefit. A model for Innovative Technology Environment relating NASA to industry, standards and regulation is described. The needs of the standards community of the X-57 are identified, and a NASA standards structure is described. No NASA project works with standards and regulatory organizations like the X-57.
    Keywords: Aircraft Design, Testing and Performance
    Type: NF1676L-34451 , NASA/CR−2019-220408
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    Certification Gap Analysis (2019)
    In:  CASI
    Details
    Publication Date: 2019-11-28
    Description: This report describes a generic method for addressing any new technology to its associated set of regulations and certification criteria. The result is a framework under which a detailed assessment can be conducted. Using just such a framework, the report maps the detailed updated regulations and evolving ASTM standards to the particular technology planning and tests. As a result, a roadmap of NASA technology is documented that shows clear transfer of technology data to industry (standards developers, as well as technology developers) and the FAA regulatory policy and certification staff upon whom certification and policy will be data-driven. A clear description of benefits and gaps are identified, as well.
    Keywords: Aircraft Design, Testing and Performance
    Type: NF1676L-34450
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    How Certain Physical Considerations Impact Aerostructural Wing Optimization (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Wing design optimization has been studied extensively and is of continued interest as optimization tools are developed and become more accessible. In each of these studies, certain assumptions and simplifications are made to make the design problem tractable. However, it is difficult to find systematic studies in which several considerations are added or removed one at a time to study how much impact they have. In this work, we examine how certain physical considerations (viscous drag, wave drag, thrust loads, and inertial relief from structural, fuel, and engine masses), impact the aerostructural optimization results for three distinct aircraft wings. The goal is to help develop a rough idea of how important these physical considerations are. We do this using gradient-based optimization and a multidisciplinary design optimization framework, OpenMDAO. We use the open-source tool OpenAeroStruct that couples a vortex lattice method to a finite element method. We establish a baseline aerostructural design optimization problem then perform a series of optimizations, each with one physical consideration removed from the baseline case. We find that depending on the size of the aircraft and flight conditions, the importance of some of these physical considerations varies considerably whereas the importance of others do not. Specifically, the optimal designs change radically without proper viscous and wave drag considerations and smaller aircraft with more distributed propulsion are more affected by the inclusion of engine loads.
    Keywords: Aircraft Design, Testing and Performance
    Type: GRC-E-DAA-TN68633 , GRC-E-DAA-TN68641 , AIAA Aviation and Aeronautics Forum (Aviation 2019); Jun 17, 2019 - Jun 21, 2019; Dallas, TX; United States
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    ScaleResolving Simulations of a Fundamental TrailingEdge Cooling Slot Using a DiscontinuousGalerkin SpectralElement Method (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The accurate prediction of turbulent mixing in high-pressure turbines that incorporate various airfoil surface-cooling strategies is becoming increasing critical to the design of modern gas turbine engines where the quest for improved efficiency is driving compressor overall pressure ratios and turbine inlet temperatures to much higher levels than ever before. In the present paper, a recently developed computational capability for accurate and efficient scaleresolving simulations of turbomachinery is extended to study the turbulent mixing mechanism of a simplified abstraction of an airfoil trailing-edge cooling slot - a plane wall jet with finite lip thickness discharging into an ambient flow. The computational capability is based on an entropy stable, discontinuousGalerkin approach that extends to arbitrarily high orders of spatial and temporal accuracy. The numerical results show that the present simulations capture the trends observed in the experiments. Discrepancies between the simulations and experiments are believed to be due to differences in the inflow profiles and tunnel sidewall effects. The thick lip configuration leads to a thicker wake and higher unsteadiness in the wall jet compared to the thin lip. A detailed comparison of the turbulent flowfields is presented to highlight differences arising due to lip thickness variations.
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN63837 , ASME Turbomachinery Technical Conference & Exposition; Jun 17, 2019 - Jun 21, 2019; Phoenix, AZ; United States
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    Acoustic Testing of the Tiltrotor Test Rig in the National Full-Scale Aerodynamics Complex 40- by 80-Foot Wind Tunnel (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The Tiltrotor Test Rig (TTR) was tested in the National Full-Scale Aerodynamics Complex (NFAC) 40- by 80-Foot Wind Tunnel from 2017 to 2018. The rotor system can be configured in airplane mode, with the rotor plane perpendicular to the wind flow, and in helicopter mode, with the rotor plane parallel to the wind flow. Four microphones were placed around the TTR: two on the wind tunnel floor and two on struts. The primary goal of the test was to understand the operational capabilities of the TTR, while also acquiring research data as available. Limited measurements of the blade vortex interaction (BVI) noise of the TTR rotor were taken to not only understand the acoustic testing capabilities of the TTR in the NFAC 40- by 80-Foot Wind Tunnel, but to also compare to previous tests and to be used for future validation studies. In particular, data will be compared to measurements of an XV-15 rotor previously acquired in the NFAC 80- by 120-Foot Wind Tunnel.
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN62155 , Vertical Flight Society''s Annual Forum and Technology Display; May 13, 2019 - May 16, 2019; Philadelphia, PA; United States
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    Multipoint Variable Cycle Engine Design Using Gradient-based Optimization (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Supersonic aircraft are challenging to optimally design due to the widely varying constraints and flight conditions they experience. Additionally, a large number of disciplinary subsystems must be considered due to highly complex design requirements. One subsystem that has a major effect on overall performance is the engine. In this work, we construct a supersonic mixed-flow variable cycle engine and perform multipoint gradient-based optimization using this model. We see that the operational variables allow the optimizer to tailor performance at each individual flight condition, leading to better overall performance. To simulate airframe integration constraints, we run successive optimizations with increasingly restrictive inlet areas and see decreases in engine performance. This work is part of a larger effort to incorporate engine design into aero-thermal-mission optimization of a supersonic aircraft.
    Keywords: Aircraft Design, Testing and Performance
    Type: GRC-E-DAA-TN63727 , AIAA 2019-0172 , AIAA SciTech Forum 2019; Jan 07, 2019 - Jan 11, 2019; San Diego, CA; United States
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    Load Flow Analysis with Analytic Derivatives for Electric Aircraft Design Optimization (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Many of the aircraft concepts of the future are exploring the use of hybrid-, turbo- or all-electric propulsion systems to improve performance and decrease environmental impacts. These aircraft concepts range from small rotorcraft for urban air mobility to conventional commercial transports to large blended wing body designs. Developing the conceptual design for these vehicles presents a challenge, however, as traditional aircraft design tools often were not developed to handle these unique propulsion system architectures. Previous studies on these vehicles have therefore relied on relatively simple models of the electrical transmission and distribution system. This paper presents the development of a hybrid AC-DC load flow (or power flow) analysis capability to enhance the conceptual design of these concept vehicles. Specifically, the desire was to create a load flow analysis capability within the OpenMDAO framework that is also being used to develop a set of compatible tools for rapid optimization of conceptual designs. This load flow analysis capability is unique in its flexible object-oriented structure and implementation of analytic derivatives to facilitate the use of solvers and gradient based optimization in the design process. The developed hybrid load flow analysis capability is first verified against a published 13-bus example then used to model the electrical distribution system for a turbo-electric tiltwing aircraft.
    Keywords: Aircraft Design, Testing and Performance
    Type: GRC-E-DAA-TN63675 , AIAA Science and Technology Forum and Exposition (SciTech); Jan 07, 2019 - Jan 11, 2019; San Diego, CA; United States
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    Gradient-Based Propeller Optimization with Acoustic Constraints (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Urban Air Mobility vehicles are intended to operate near or within large cities, where a significant portion of the public will be exposed to the noise they create. If these vehicles are to become acceptable to the public, designers must be able to manage the amount of noise they generate, and understand the relationship between traditional performance metrics (thrust, efficiency, etc.) and noise. As a first step to addressing this need, this work combines a blade element momentum theory tool (OpenBEMT) with an acoustic prediction tool (ANOPP2) to optimize a propeller subject to both aerodynamic and acoustic constraints. These tools are developed within a optimization framework (OpenMDAO) that allows analytic derivatives to be propagated through the models and passed to a gradient-based optimizer. This tool chain is exercised on the cruise propellers from the X-57 Maxwell, and yields propeller designs that reduced the overall sound pressure level by about 5 dB for a cost of 1% propeller efficiency.
    Keywords: Aircraft Design, Testing and Performance
    Type: GRC-E-DAA-TN63365 , SCITECH 2019 (AIAA); Jan 07, 2019 - Jan 11, 2019; San Diego, CA; United States
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    Computing the Effective Thermal Conductivity of Anisotropic Porous Media from Micro-Computed Tomography (2019)
    In:  CASI
    Details
    Publication Date: 2019-10-12
    Description: No abstract available
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN71894 , U.S. National Congress on Computational Mechanics; Jul 28, 2019 - Aug 01, 2019; Austin, TX; United States
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    Conceptual Design of a Counter-Rotating Fan System for Distributed Boundary Layer Ingesting Propulsion (2019)
    In:  CASI
    Details
    Publication Date: 2019-10-01
    Description: The present paper details the design of the counter rotating fans for a Turboelectric Distributed Propulsion (TeDP) system. Sixteen propulsors installed in mail-slot-shape nacelles are embedded on an aerodynamically optimized hybrid wing-body configuration. The hybrid-wing/body (HWB) configuration which was previously designed to satisfy the conditions of trim, longitudinally static stability and specific cargo space is employed as the baseline configuration in pursuing an optimal distributed propulsion system. A set of distributed propulsors is conceptually designed and the collective performance is evaluated against the target thrust mandated by the mission requirements. The concept of the distributed propulsion allows the fan pressure ratio to be around 1.27~1.32 for the target thrust. In addition, further splitting of the fan pressure ratio by using the counter-rotating fans for each slot realizes the target pressure ratio with low tip speed. In the distributed propulsion system, the nature of the flow conditions and/or the thickness of the ingested boundary layer may differ and result in different propulsive reaction of each individual propulsor. The optimization is, thus, approached from both the propulsion system and individual propulsor perspectives. An optimal distribution of the thrust and power output is determined by how the system utilizes each passage's propulsive characteristics and its interaction with the airframe. These system level analysis and optimization are conducted using an actuator disk model to account for the propulsion-airframe integration numerically. With respect to the propulsor level, aerodynamic shape optimizations of the fan blades are performed in a sequential multi-objective optimization process for various design objectives, such as mass flow rate condition, fan pressure ratio, efficiency and the exit flow angle of the fan stage by using a genetic algorithm, NSGA-II. The radial chord distribution, and meanline distribution of the rotors are designed on the circumferentially averaged axi-symmetric inlet profiles and tested on the six inlet profiles from six divided sectors to reckon flow distortion. The performances of the counter rotating fans are, thus, evaluated accordingly for obtaining distortion tolerant fan. The performance of the distributed propulsion system is evaluated by two CFD tools, i.e., a multi-stage turbo-machinery CFD code and one propulsion-airframe integration flow solver coupled with a body-force model. The optimized boundary layer ingestion propulsion system of 16 distributed slots not only reaches the system target thrust, but also delivers a close to 20% fuel saving benefit against its counterpart 12 distributed clean inlet propulsion system.
    Keywords: Aircraft Design, Testing and Performance
    Type: GRC-E-DAA-TN72036 , The International Society for Air Breathing Engines (ISABE) Conference 2019; Sep 22, 2019 - Sep 27, 2019; Canberra; Australia
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    Bounding Methods for Heterogeneous Lidar-derived Navigational Geofences (2019)
    In:  CASI
    Details
    Publication Date: 2019-10-01
    Description: Safe Unmanned Aerial Vehicle (UAV) operations near the ground require navigation methods that avoid fixed obstacles such as buildings, power lines and trees. Aerial lidar surveys of ground structures are available with the precision and accuracy to geolocate obstacles, but the high volume of raw survey data can exceed the compute power of onboard processors and the rendering ability of ground-based flight planning maps. Representing ground structures with bounding polyhedra instead of point clouds greatly reduces the data size and can enable effective obstacle avoidance, as long as the bounding geometry envelopes the structures with high spatial fidelity. This report describes in detail four methods to compute bounding geometries of ground obstacles from lidar point clouds. The four methods are: 1) 2.5D Maximum Elevation Box, 2) 2.5D Ground Map Extrusion, 3) 3D Bounding Cylinder, and 4) 3D Bounding Box. The methods are applied to five point cloud datasets from lidar surveys of UAV flight research sites in Georgia and Virginia with an average point spacing that ranges from 0.1m to 0.6m. The methods are assessed using survey areas with geometrically heterogeneous ground structures: buildings, vegetation, power lines, and sub-meter structures such as road signs and guy wires. The 2.5D Maximum Elevation Box method is useful for simple structures. The 2.5D Ground Map Extrusion method efficiently encloses vegetation, but requires handdrawn ground footprints. The 3D Bounding Cylinder method excels at enclosing linear structures such as power lines and fences. The 3D Bounding Box method excels at enclosing planar structures such as buildings. The methods are compared on the basis of data compression and boundary fidelity on selected areas. The 2.5D methods yield the highest data compression but the polyhedra produced by them enclose significant amounts of empty space. Boundary fidelity is superior for the 3D methods, though this fidelity comes at the cost of a roughly thirtyfold lower data compression ratio than the 2.5D Maximum Elevation Box method. A mix of these output geometries is proposed for autonomous UAV navigation with limited on-board computing. Both the accuracy and spatial detail of emerging satellite-based survey technology lower than that of aerial lidar scanning survey technology. Sub-meter structures and thin linear structures are not reliably mapped at present by satellite-based surveys.
    Keywords: Aircraft Design, Testing and Performance
    Type: NF1676L-34257 , NASA/TM–2019-22399
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    Airborne Spacing for Terminal Arrival Routes (ASTAR) Proof-of-Concept Flight Test (2019)
    In:  CASI
    Details
    Publication Date: 2019-10-01
    Description: The Airborne Spacing for Terminal Arrival Routes (ASTAR) Flight Test was conducted by the NASA Air Traffic Management Technology Demonstration 1 (ATD- 1) project to demonstrate the use of NASAs ASTAR algorithm beyond a simulated environment and assess the operational risks of performing a multi-aircraft flight test of Flight-deck Interval Management (FIM). Utilizing contemporary tools of the Federal Aviation Administrations Next Generation Air Transportation System (NextGen) such as ADS-B, the ASTAR algorithm calculated speeds that the flight crew flew to achieve a precise spacing interval behind another aircraft at the final approach fix. Airspeed commands issued by the algorithm were flown by the flight crew of the FIM-equipped aircraft to achieve or maintain an assigned spacing goal from a target vehicle. The ASTAR algorithm was integrated with the Boeing supplied B-787 ecoDemonstrator aircraft, and five flight trials were conducted as a joint effort between NASA and Boeing on December 12, 2014. Initial results indicated arrival times within several seconds of accuracy of the planned termination point between two aircraft performing FIM in a real world environment. This flight test opened the way for the much more expansive ATD-1 Avionics Phase II flight test which occurred in early 2017. The flight trials under Phase II preceded further testing by the community in preparation for inclusion of the Interval Management concept as a part of the NextGen environment.
    Keywords: Aircraft Design, Testing and Performance
    Type: NASA/TM–2019-220404 , L-20741 , NF1676L-25257
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    Integrated Test and Evaluation (IT&E) FT6 (2019)
    In:  CASI
    Details
    Publication Date: 2019-11-21
    Description: These slides are an overview of the FT6 Test and Evaluation program.
    Keywords: Aircraft Design, Testing and Performance
    Type: AFRC-E-DAA-TN75432 , UAS-NAS FT6 VIP Day at Edwards Airforce Base; Nov 12, 2019; Kern County, CA; United States
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    Usability Test of a Prototype UAS (Unmanned Aircraft Systems) Awareness Interface for Public Users (2019)
    In:  CASI
    Details
    Publication Date: 2019-11-20
    Description: A tool to give the public a window into Unmanned Aerial Systems (UAS) Traffic Management (UTM) operations was created from an existing data collection tool. The interface included a map and a table showing details about UAS operations that could be queried in a number of ways. Eleven participants attended the study, successfully completing a 19-item task set in about 30 minutes. They correctly found information for 87% of the non-subjective tasks at a rate of around a minute per task, and rated the usability of the tool at the end of the session above the industry benchmark. Participants gave favorable reviews of the "public portal tool", even reporting that they would be satisfied with less information that it presented. There were one or two elements of the display that users found distracting and some navigation functions that need improvement, but on balance, the public representatives liked the features they saw in, and had few criticisms of, the public portal tool. One important issue for the small Unmanned Aerial System community to resolve will be how much or how little information should be available about UTM operations to members of the public.
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN74749 , Human Factors and Ergonomics Society (HFES) 2019; Oct 28, 2019 - Nov 01, 2019; Seattle, WA; United States
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    Usability Test of a Prototype UAS Awareness Interface for Public Users (2019)
    In:  CASI
    Details
    Publication Date: 2019-11-20
    Description: A tool to give the public a window into Unmanned Aerial Systems (UAS) Traffic Management (UTM) operations was created from an existing data collection tool. The interface included a map and a table showing details about UAS operations that could be queried in a number of ways. Eleven participants attended the study, successfully completing a 19-item task set in about 30 minutes. They correctly found information for 87% of the non-subjective tasks at a rate of around a minute per task, and rated the usability of the tool at the end of the session above the industry benchmark. Participants gave favorable reviews of the "public portal tool", even reporting that they would be satisfied with less information that it presented. There were one or two elements of the display that users found distracting and some navigation functions that need improvement, but on balance, the public representatives liked the features they saw in, and had few criticisms of, the public portal tool. One important issue for the small Unmanned Aerial System community to resolve will be how much or how little information should be available about UTM operations to members of the public.
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN66269 , Human Factors and Ergonomics Society (HFES) Annual Meeting 2019; Oct 28, 2019 - Nov 01, 2019; Seattle, WA; United States
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    Advanced Air Vehicles Program: Opening New Aviation Markets for U.S. Leadership (2019)
    In:  CASI
    Details
    Publication Date: 2019-11-19
    Description: Overview of the projects in the Advanced Air Vehicle Program, Aeronautics Research Mission Directorate.
    Keywords: Aircraft Design, Testing and Performance
    Type: HQ-E-DAA-TN75332 , 2019 Transportation and Defense Policy Fly-In; Nov 12, 2019 - Nov 13, 2019; Washington, DC; United States
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    Future Vertical Lift Propulsion Systems & Associated S&T Challenges (2019)
    In:  CASI
    Details
    Publication Date: 2020-01-22
    Description: No abstract available
    Keywords: Aircraft Design, Testing and Performance
    Type: GRC-E-DAA-TN74511 , Propulsion and Power Technical Meeting; Oct 29, 2019 - Oct 30, 2019; Hampton, VA; United States
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    An Innovative Feedback Controls Design Approach for Aero Engines (2019)
    In:  CASI
    Details
    Publication Date: 2020-01-18
    Description: The paper describes a feedback controls design approach for a generic regional jet turbofan engine, which can be adapted to aero engines in general. To demonstrate this approach, linear models for control design are generated at different operating conditions from a full envelope nonlinear simulation created with the NASA Glenn Research Center-developed Toolbox for the Modeling and Analysis of Thermodynamic Systems. The primary objective is to design a single feedback controller that achieves good performance, without the need of developing scheduled control designs to cover the engine operating envelope. An additional objective is to progressively design more robust controllers that can perform under large variations in plant dynamics to also cover control for engine limits and potentially for some off nominal or even damaged conditions.
    Keywords: Aircraft Design, Testing and Performance
    Type: NASA/TM-2019-220361 , E-19750 , GRC-E-DAA-TN73199 , Propulsion and Energy Forum; Aug 19, 2019 - Aug 22, 2019; Indianapolis, IN; United States
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    Optimizing the Model of the Viking-400 UAS (2019)
    In:  CASI
    Details
    Publication Date: 2020-01-17
    Description: This project intends to update and redesign imperfections in the scanned 3D CAD model of the Viking 400 aircraft. This aircraft, similar to the Sierra-B UAS, will carry payloads of scientific instruments for research purposes. The goals of this project are to modify the current scanned model such that it better represents the physical qualities of the aircraft, as well as creating the features that are missing from the model. As the model was imported from a different software, many of the critical surfaces did not accurately reflect the actual aircraft. Those parts of the model were redesigned entirely so that they can be edited for future use, as well as correctly representing the aircraft as it is now. Additionally, parts of the aircraft that did not appear in the scanned model were designed and added to the new model. In order to prioritize ease of use for future missions, the model has been reorganized in a logical fashion that enables modification of specific parts of the aircraft. The organization of this model imitates the drawing tree of the Sierra-B, with the intention of maintaining a functional system of redesign, analysis, and implementation. Ultimately, this project will be a catalyst for making Viking 400 into a functional aircraft and increasing scientific research in airborne vehicles.
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN70779 , Ames Intern Poster Session; Aug 08, 2019; Moffett Field, CA; United States
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    Analysis of the Parallel Electric-Gas Architecture with Synergistic Utilization Scheme (PEGASUS) Concept (2019)
    In:  CASI
    Details
    Publication Date: 2019-09-21
    Description: The Parallel Electric-Gas Architecture with Synergistic Utilization Scheme (PE- GASUS) vehicle is a regional aircraft concept that uses electric and hybrid-electric propulsors located strategically to obtain aerodynamic and mission benefits. Traditional aircraft analysis tools are not well suited to analyze the PEGASUS aircraft due to the different propulsor types used. This report summarizes a methodology that addresses some of the mission analysis challenges expected in modeling this vehicle concept. An initial baseline design is selected and sensitivity studies are performed to further understand the potential benefits of the concept.
    Keywords: Aircraft Design, Testing and Performance
    Type: NASA/TM–2019–220396 , L-21042 , NF1676-33672
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    X-57 Mod 2 Motor Thermal Analysis (2019)
    In:  CASI
    Details
    Publication Date: 2019-11-08
    Description: This work covers the refinement of thermal models from design estimates to actual fabricated performance. Matching the experimental data of the first fully electrified version of the X-57 Maxwell experimental vehicle requires high fidelity thermal analysis to sufficiently capture the electric motor and inverter temperature profiles. Qualification test data of the motors and inverters is used to validate finite element analysis models used to simulate thermal performance over mission transients. An additional thermal-hydraulic models is used to estimate flow characteristics through the propulsor nacelle and component heat sinks. After calibration of the higher order models, overall component sizing and peak temperature constraints can be distilled to reduced order models, to improve modelflexibility and utility.
    Keywords: Aircraft Design, Testing and Performance
    Type: GRC-E-DAA-TN56452 , AIAA Aviation Forum; Jun 17, 2019 - Jun 21, 2019; Dallas, TX; United States
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    X-59 Aircraft Life Support System Integrated Test Planning, Execution, and Results (2019)
    In:  CASI
    Details
    Publication Date: 2019-10-23
    Description: These slides describe the design and execution of the testing and integration of the X-59 life support system.
    Keywords: Aircraft Design, Testing and Performance
    Type: AFRC-E-DAA-TN73893 , Annual SAFE Symposium; Oct 14, 2019 - Oct 16, 2019; Reno, NV; United States
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    Seismic Recordings for SMARTIE1: Seismic Monitoring And Research of Wind Turbine Induced Emissions 1 (2019)
    GFZ Data Services
    Details
    Publication Date: 2023-02-08
    Description: Abstract
    Description: SMARTIE1 is a joint seismological experiment of the Karlsruhe Institute of Technology (KIT) and the Leipzig University. We installed in total 36 seismic stations as ring-like and profile-like measurements near to a single wind turbine (WT) at the Fraunhofer Institute for Chemical Technology (ICT) in Pfinztal, SW Germany, for 21 days. The main goals of this project are a better understanding of a single WT as a seismic source and the development of propagation models for the WT-induced seismic signals, depending on the geological properties. Waveform data are available from the GEOFON data centre, under network code X8 (under CC-BY 4.0 license according to GIPP-rules), and are embargoed until Jan 2020.
    Keywords: Broadband seismic waveforms ; Seismology ; temporary local seismic experiment ; induced seismic signals ; wind turbine ; Monitoring system ; Seismological stations ; In Situ/Laboratory Instruments 〉 Magnetic/Motion Sensors 〉 Seismometers ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS
    Type: Dataset , Seismic Network
    Format: ~1T
    Format: .mseed
    Format: XML
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    Crustal Seismicity along for the Southern Andes Volcanic Zone (LOFS) (2019)
    GFZ Data Services
    Details
    Publication Date: 2024-02-23
    Description: Abstract
    Description: The Liquiñe-Ofqui fault system (LOFS) in south-central Chile provides a natural laboratory to assess the interplay between magma/hydrothermal fluid flow and crustal deformation. Understanding these processes is of paramount importance for geothermal energy exploration and seismic hazard assessment. We deployed a dense seismic network (Sielfeld et al., 2019) at the northern termination of the LOFS in south-central Chile (~38°S) between 2014 March and 2015 June. The main aim was to better understand the significance and implications of seismic activity in relation to geological information such as the complex fault-fracture network, volcanoes, and the stress field estimated from geological data. As a result, the network was designed to monitor the northern segment of the LOFS on a more regional scale rather than concentration on the activity of one volcano. The network covered a ~200‐km‐long section of the Southern Volcanic Zone, including several Holocene stratovolcanoes (Callaqui, Copahue, Caviahue Caldera, Tolhuaca, Lonquimay, Llaima, Sierra Nevada, Sollipulli, Villarrica, Quetrupillán, Lanín (La), and Mocho‐Choshuenco). Waveform data are open and available under network code 3H from the GEOFON data centre under license CC BY 4.0.
    Keywords: Broadband seismic waveforms ; Seismology ; temporary local seismic experiment ; LOFZ ; LOFS ; seismological data ; Monitoring system ; EARTH SCIENCE 〉 SOLID EARTH ; In Situ/Laboratory Instruments 〉 Magnetic/Motion Sensors 〉 Seismometers ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS 〉 SEISMOLOGICAL STATIONS
    Type: Dataset , Seismic Network
    Format: ~650G
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    Monitoring the unrest of ElHierro Island with seismic observations (2019)
    GFZ Data Services
    Details
    Publication Date: 2024-02-23
    Description: Abstract
    Description: The unrest of el Hierro Islands started in 2011 with a submarine volcanic eruption. In order to better characterize unrest of El Hierro Island 9 landstations were installed on the Island of ElHierro (Figure 1) between March 2015 and June 2016. Waveform data are available from the GEOFON data centre, under network code 2L and are embargoed until Jan 2021.
    Keywords: Broadband seismic waveforms ; Seismology ; temporary local seismic experiment ; ElHierro ; seismological data ; Monitoring system ; EARTH SCIENCE 〉 SOLID EARTH ; In Situ/Laboratory Instruments 〉 Magnetic/Motion Sensors 〉 Seismometers ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS 〉 SEISMOLOGICAL STATIONS
    Type: Dataset , Seismic Network
    Format: ~240G
    Format: .mseed
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    One year of seismic records of an array installed on a taiwanese ridge (2019)
    GFZ Data Services
    Details
    Publication Date: 2024-02-23
    Description: Abstract
    Description: A line of 6 broadband seismometers have been deployed across a ridge in the Hualien County (Eastern Taiwan). From March 2015 to June 2016 the network has been continuously recording waves incoming from the Taiwanese regional seismicity. During that period, more than 2000 earthquakes with magnitudes Ml〉3 and distant from less than 200km were recorded. The hill is well approximated by a triangular topography of 3600m in length by 900m in height. Waveform data are open and available from the GEOFON data centre, under network code 5K.
    Keywords: Broadband seismic waveforms ; Seismology ; temporary local seismic experiment ; Monitoring system ; EARTH SCIENCE 〉 SOLID EARTH ; In Situ/Laboratory Instruments 〉 Magnetic/Motion Sensors 〉 Seismometers ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS 〉 SEISMOLOGICAL STATIONS
    Type: Dataset , Seismic Network
    Format: ~240G
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    Multi-scale imaging of the Main Pamir Thrust faults within the framework of CaTeNA project – Climatic and Tectonic Natural Hazards in Central Asia (2019)
    GFZ Data Services
    Details
    Publication Date: 2024-02-23
    Description: Abstract
    Description: We propose to investigate the structure and evolution of the Main Pamir Thrust (MPT) with a high-density seismological array. The MPT, with its surface expression along the east-west trending Alai Valley, marks the northern boundary of the Pamir. The Alai Valley, separating the Pamir and the Tien Shan, constitutes the last vestige of a formerly continuous basin that linked the Tarim and the Tajik Basins. The MPT manifests itself as a place of high seismic activity with frequently occurred disastrous earthquakes. The array is about 50 km long, consisted of 90 three-component geophones (stations G?? and C??) and 10 Trillium-Compact seismometers (stations T??), and equipped with 100 CUBE dataloggers. We will construct a high-resolution receiver function profile to image the MPT and accurately locate the local earthquakes associated with the MPT. Funded by BMBF, within the framework of CaTeNA project – Climatic and Tectonic Natural Hazards in Central Asia. Waveform data are available from the GEOFON data centre, under network code 7A and are embargoed until Jan 2024.
    Keywords: Broadband seismic waveforms ; Seismology ; temporary local seismic experiment ; Monitoring system ; EARTH SCIENCE 〉 SOLID EARTH ; In Situ/Laboratory Instruments 〉 Magnetic/Motion Sensors 〉 Seismometers ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS 〉 SEISMOLOGICAL STATIONS
    Type: Dataset , Seismic Network
    Format: ~240G
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    Dataset of the 6G seismic network at Los Humeros, 2017-2018 (2019)
    GFZ Data Services
    Details
    Publication Date: 2024-02-23
    Description: Abstract
    Description: Extensive passive seismic monitoring was carried out between September 2017 and September 2018 over the Los Humeros geothermal field in Mexico. This experiment, in addition to several geophysical, geological, and geochemical surveys was conducted in the framework of the European H2020 and Mexican CONACyT-SENER project GEMex for a better understanding of the structures and behavior of the local geothermal system currently under exploitation, and for investigating future development areas. 25 broadband stations (22 Trillium C-120s and 3 Trillium C-20 PH) recording at 200 Hz, and 20 short period stations (Mark L-4C-3D) recording at 100 Hz comprised the network which is sub-divided into two sub-networks. An inner and denser (~1.6-2 km inter-station distance) pseudo-rhomboidal array (27 stations) was laid out to cover the producing zone and retrieve local seismicity mainly associated to injection and production operations, and to comply with beamforming of ambient noise and time reverse imaging techniques. An outer and sparser (~5 km minimum spacing) array was placed at around 30 km radius surrounding the inner network, and was mainly dedicated to larger scale imaging techniques, such as seismic ambient noise tomography, and regional earthquakes tomography. The GEMex project is supported by the European Union’s Horizon 2020 programme for Research and Innovation under grant agreement No 727550 and the Mexican Energy Sustainability Fund CONACYT-SENER, project 2015-04-68074. Waveform data are available from the GEOFON data centre, under network code 6G and are embargoed until Jan 2023.
    Keywords: Broadband seismic waveforms ; Seismology ; temporary local seismic experiment ; Monitoring system ; EARTH SCIENCE 〉 SOLID EARTH ; In Situ/Laboratory Instruments 〉 Magnetic/Motion Sensors 〉 Seismometers ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS 〉 SEISMOLOGICAL STATIONS
    Type: Dataset , Seismic Network
    Format: ~1T
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    Non-Double-Couple Component Analysis of Induced Microearthquakes in the Val d’Agri Basin (Italy) (2018)
    Details
    Publication Date: 2018-03-23
    Description: In recent years it has become accepted that earthquake source can attain significant Non-Double-Couple (NDC) components. Among the driving factors of deviation from normal double-couple (DC) mechanisms there is the opening/closing of fracture networks and the activation of pre-existing faults by pore fluid pressure perturbations. This observation makes the thorough analysis of source mechanism of key importance for the understanding of withdrawal/injection induced seismicity from geothermal and hydrocarbon reservoirs, as well as of water reservoir induced seismicity. In addition to the DC component, seismic moment tensor can be decomposed into isotropic (ISO) and compensated linear vector dipole (CLVD) components. In this study we performed a careful analysis of the seismic moment tensor of induced microseismicity recorded in the Val d'Agri (Southern Apennines, Italy) focusing our attention on the NDC component. The Val d'Agri is a Quaternary extensional basin that hosts the largest onshore European oil field and a water reservoir (Pertusillo Lake impoundment) characterized by severe seasonal level oscillations. Our input data-set includes swarm-type induced micro-seismicity recorded between 2005-2006 by a high-performance network and accurately localized by a reservoir-scale local earthquake tomography. We analyze two different seismicity clusters: (i) a swarm of 69 earthquakes with 0.3 ML 1.8 induced by a wastewater disposal well of the oilfield during the initial daily injection tests (10 days); (ii) 526 earthquakes with -0.2 ML 2.7 induced by seasonal volume changes of the artificial lake. We perform the seismic moment tensor inversion by using HybridMT code. After a very accurate signal-to-noise selection and hand-made picking of P-pulses, we obtain %DC, %ISO, %CLVD for each event. DC and NDC components are analyzed and compared with the spatio-temporal distribution of seismicity, the local stress field, the injection parameters and the water level in the impoundment. We find significant NDC components and abrupt temporal variations in the DC and ISO components that appear linked to the extremely variable parameters of the injection tests into the disposal well.
    Description: Published
    Description: New Orleans, LA
    Description: 2T. Sorgente Sismica
    Keywords: Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Poster session
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    Structural inheritance controlling active crustal deformation in the Val d’Agri area (southern Apennines, Italy): new insights from finite element modelling (2018)
    Details
    Publication Date: 2019-01-18
    Description: The availability of a large amount of surface geological data and subsurface information gathered by the oil industry, together with seismic and geodetic data, allowed us to define and analyse the active structures in the Val d'Agri area of the southern Apennines. Taking into account that the study of interseismic deformation can be significant to identify locked fault areas that can potentially slip, in this study we present 2D elastoplastic finite-element models to reproduce interseismic characteristics of the study area. This hosts the largest Europe's onshore oil field and is characterised by an active extensional tectonic regime, as inferred from earthquake focal mechanisms and fault slip data from late Quaternary structures. Based on high-quality seismic profiles tied with deep well logs, we constructed a detailed geological section across the study area. Outcropping units are dissected by numerous brittle structures that formed at various stages during the tectonic evolution of the Apennines, while the deep ones are dominated by deeply rooted major faults. The rheological behaviour has been constrained by the reconstruction of the thermal structure of the fold and thrust belt, using available information from the foreland Apulian Platform and from temperature data from a series of wells. Starting from the geological model, we reproduced interseismic deformation by means of finite-element numerical modelling, varying boundary conditions and unlocking different fault segments. Our numerical models provide new insights into the controversial and widely debated active tectonic setting of the Val d'Agri area, confirming the major role played by structural inheritance and reactivation processes. In fact, recent low-magnitude seismicity tends to illuminate fault segments consisting of pre-existing reverse faults reactivated as normal faults in the present-day stress field. These long-lived, mature fault systems occurring in the buried Apulian Platform carbonates (and underlying basement) represent major brittle structures that cumulated displacements of up to a few kilometres over geologic time. As a result of their reactivation within the late Quaternary extensional stress field, these long-lived crustal structures are capable of nucleating also moderate- to large-magnitude earthquakes. The decoupling between deep and shallow structural levels, and the different inherited structures affecting them, explain the apparent contrast between the subdued surface expression of active fault systems and the known occurrence of large magnitude seismic events in the study area, thus reconciling apparently contrasting geological and geophysical constraints.
    Description: Published
    Description: 111-114
    Description: 1T. Deformazione crostale attiva
    Description: N/A or not JCR
    Keywords: Active tectonics ; Fault reactivation ; Stress field ; Seismicity ; Extensional tectonics ; Seismology ; Tectonophysics
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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    Journal of Geophysics - Zeitschrift für Geophysik 48 (2018)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 28 Artikel zu Themengebieten der Geophysik, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1980.
    Description: Inhaltsverzeichnis: Journal of Geophysics 48 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0012.pdf"〉The Analysis of Simultaneous Observations of Nighttime Pi Pulsations on an East-West Profile〈/a〉〈br〉 (Baranskiy, L. N., Troitskaya, V. A., Sterlikova, I. V., Gokhberg, M. B., Ivanov, N. A., Khartchenko, I. P., Münch, J. W., Wilhelm, K.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0013.pdf"〉Coordinated Magnetic Observations of Morning Sector Auroral Zone Currents With Triad and the Scandinavian Magnetometer Array: A Case Study〈/a〉〈br〉 (Sulzbacher, H., Baumjohann, W., Potemra, T. A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0014.pdf"〉K – Ar Age Determinations on Tertiary Volcanic Rocks: V. Siebengebirge, Siebengebirge-Graben〈/a〉〈br〉 (Todt, W., Lippolt, H. J.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0015.pdf"〉The Geothermal Anomaly of Landau/Pfalz: An Attempt of Interpretation〈/a〉〈br〉 (Werner, D., Parini, M.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0016.pdf"〉Magnetic and Gravity Investigations of the Dead Sea Rift and Adjacent Areas in Northern Israel〈/a〉〈br〉 (Folkman, Y.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0017.pdf"〉Changes of Structure, Phase Composition and Electric Conductivity Under High-Temperature Oxidation of Titanomagnetites〈/a〉〈br〉 (Kropáček, V., Laštovičková, M.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0018.pdf"〉Maximum Velocity Amplitudes of 〈i〉P〈/i〉 and 〈i〉S〈/i〉 Waves From Filtered Broadband Records〈/a〉〈br〉 (Sitaram, M. V. D, Plešinger, A., Vaněk, J.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0019.pdf"〉Comment on: On the Sources of the 12-Month Wave in the 〈i〉an〈/i〉 and 〈i〉as〈/i〉 Geomagnetic Activity Indices〈/a〉〈br〉 (Mayaud, P. N.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0020.pdf"〉Book Reviews〈/a〉〈br〉 (Schopper, J., Hartmann, G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0021.pdf"〉A Late Cretaceous 〈sup〉40〈/sup〉Ar–〈sup〉39〈/sup〉Ar Age for the Lappajärvi Impact Crater, Finland〈/a〉〈br〉 (Jessberger, E. K., Reimold, W. U.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0022.pdf"〉Magnetic Properties of Swiss Flysch〈/a〉〈br〉 (Channell, J., Freeman, R., Heller, F.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0023.pdf"〉Source Parameters of Earthquakes From the Himalayan Region〈/a〉〈br〉 (Upadhyay, S. K., Duda, S. J.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0024.pdf"〉Teleseismic Evidence for Velocity Heterogeneity Beneath the Rhenish Massif〈/a〉〈br〉 (Raikes, S.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0025.pdf"〉The Simulation Problem for Broad-Band Seismograms〈/a〉〈br〉 (Seidl, D.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0026.pdf"〉Load-Induced Stresses and Their Relation to the Initial Stress Field〈/a〉〈br〉 (Bock, G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0027.pdf"〉Ground-Based Observations of an Onset of Localized Field-Aligned Currents During Auroral Breakup Around Magnetic Midnight〈/a〉〈br〉 (Opgenoorth, H. J., Pellinen, R. J., Maurer, H., Küppers, F., Heikkila, W. J., Kaila, K. U., Tanskanen, P.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0028.pdf"〉Simultaneous Maxima of Geomagnetic Pulsations and Riometer Absorption on the Afternoon Side of the Auroral Zone〈/a〉〈br〉 (Novikov, Y., Kopytenko, Y., Raspopov, O., Bösinger, T., Kangas, J., Ranta, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0029.pdf"〉Numerical Investigation of the Spectral Resolving Power of Burg's Maximum Entropy Method〈/a〉〈br〉 (Wenzel, F., Zürn, W.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0030.pdf"〉Errors in Matrix Element Expressions for the Reflectivity Method〈/a〉〈br〉 (Baumgardt, D.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0031.pdf"〉Magnetometer Array Observations of a Giant Pulsation Event〈/a〉〈br〉 (Glaßmeier, K.-H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0032.pdf"〉Palaeomagnetic Secular Variation Curves Extending Back to 13,400 years B.P. Recorded by Sediments Deposited in Lac de Joux, Switzerland〈/a〉〈br〉 (Creer, K., Hogg, T. E., Readman, P. W., Reynaud, C.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0033.pdf"〉Anhysteretic Remanent Magnetization of Small Multidomain Fe〈sub〉3〈/sub〉O〈sub〉4〈/sub〉 Particles Dispersed in Various Concentrations in a Non Magnetic Matrix〈/a〉〈br〉 (Schmidbauer, E., Veitch, R. J.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0034.pdf"〉Stirred Remanent Magnetization: A Laboratory Analogue of Post-Depositional Realignment〈/a〉〈br〉 (Tucker, P.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0035.pdf"〉High Precision Measurement of the Frequency of Mode 〈sub〉O〈/sub〉S〈sub〉O〈/sub〉〈/a〉〈br〉 (Zürn, W., Knopoff, L., Rydelek, P. A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0036.pdf"〉The Solution of Dynamic Problems of Elastic Wave Propagation in Inhomogeneous Media by a Combination of Partial Separation of Variables and Finite-Difference Methods〈/a〉〈br〉 (Alekseev, A. S., Mikhailenko, B. G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0037.pdf"〉A Characteristic Method for Numerical Solution of the Inverse Kinematic Seismic Problems〈/a〉〈br〉 (Romanov, M. E., Alekseev, A. S.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0038.pdf"〉Geomagnetic Induction Studies in Scandinavia〈/a〉〈br〉 (Jones, A. G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0048/LOG_0039.pdf"〉Comments on Polarization and Coherence〈/a〉〈br〉 (Samson, J. C.)〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DFG, SUB Göttingen
    Keywords: 550 ; Geophysik ; Auroral Zone Physics ; Broad Band Seismograms ; Earth’s Crust ; Earth’s Mantle ; Electrical Conductivity of Rocks ; Electrical Conductivity of the Earth ; Electromagnetic lnduction in the Earth ; Free Oscillations ; Geochronology ; Geomagnetic Activity ; Geomagnetic Pulsations ; Geomagnetic Time Variations ; Geothermal Anomalies ; Gravity Anomalies ; Himalaya ; Impact Structures ; Induced Seismicity ; Inverse Seismic Problems ; Israel ; Magnetic Anomalies ; Maximum Entropy Method ; Palaeomagnetism ; Polarization Analysis ; Reflectivity Method ; Rheinisches Massiv ; Rock Magnetism ; Rock Physics ; Scandinavia ; Secular Variation ; Seismology ; Siebengebirge ; Stress Field ; Theoretical Seismograms ; FID-GEO-DE-7
    Language: English
    Type: anthology_digi
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    The crust and upper mantle structure of central and West Antarctica from Bayesian inversion of Rayleigh Wave and receiver functions (2018)
    John Wiley & Sons
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © American Geophysical Union, 2018. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Solid Earth 123 (2018): 7824-7849, doi:10.1029/2017JB015346.
    Description: We construct a new seismic model for central and West Antarctica by jointly inverting Rayleigh wave phase and group velocities along with P wave receiver functions. Ambient noise tomography exploiting data from more than 200 seismic stations deployed over the past 18 years is used to construct Rayleigh wave phase and group velocity dispersion maps. Comparison between the ambient noise phase velocity maps with those constructed using teleseismic earthquakes confirms the accuracy of both results. These maps, together with P receiver function waveforms, are used to construct a new 3‐D shear velocity (Vs) model for the crust and uppermost mantle using a Bayesian Monte Carlo algorithm. The new 3‐D seismic model shows the dichotomy of the tectonically active West Antarctica (WANT) and the stable and ancient East Antarctica (EANT). In WANT, the model exhibits a slow uppermost mantle along the Transantarctic Mountains (TAMs) front, interpreted as the thermal effect from Cenozoic rifting. Beneath the southern TAMs, the slow uppermost mantle extends horizontally beneath the traditionally recognized EANT, hypothesized to be associated with lithospheric delamination. Thin crust and lithosphere observed along the Amundsen Sea coast and extending into the interior suggest involvement of these areas in Cenozoic rifting. EANT, with its relatively thick and cold crust and lithosphere marked by high Vs, displays a slower Vs anomaly beneath the Gamburtsev Subglacial Mountains in the uppermost mantle, which we hypothesize may be the signature of a compositionally anomalous body, perhaps remnant from a continental collision.
    Description: National Science Foundation Grant Numbers: PLR‐1142518, PLR‐1246712, PLR 1246151, PLR‐1246416, PLR‐1744883, PLR‐ 1744883
    Description: 2019-03-22
    Keywords: Seismology ; Crust and uppermost mantle ; Ambient noise tomography ; Antarctica ; Transantarctic Mountains ; Gamburtsev Mountains
    Repository Name: Woods Hole Open Access Server
    Type: Article
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    Assessment of seabed seismic systems (2018)
    Woods Hole Oceanographic Institution
    Details
    Publication Date: 2022-05-26
    Description: This project was initiated to accomplish the necessary research and documentation of existing seismic techniques and systems for the study of sediments and sedimentary structures in the oceans. In this respect , it is an 'inventory' of methods and techniques for looking at small-scale features or changes in structures lying from 10 to 1000 m beneath the sea floor. It attempts to assess the vertical and lateral resolution capabilities of existing and technically feasible seismic systems. Some of the questions posed are: how closely can we determine vertical variation such as sediment layer thickness and vertical variation with depth; also lateral coherence or its disruption by such agents as facies changes, thinning or thickening, slumping, faulting; the nature of the basement structure, its areal coherence, velocity structure and associated anomalies?
    Description: Prepared for the Sandia Laboratories under Contract 13-9944.
    Keywords: Seismology ; Ocean bottom
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
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    Microearthquake activity on the Orozco Fracture Zone : preliminary results from Project ROSE (2018)
    Woods Hole Oceanographic Institution
    Details
    Publication Date: 2022-05-26
    Description: Also published as: Journal of Geophysical Research 86 (1981): 3783- 3790
    Description: We present preliminary hypocenter determinations for 52 earthquakes recorded by a large multiinstitutional network of ocean bottom seismometers and ocean bottom hydrophones in the Orozco Fracture Zone in the eastern Pacific during late February to mid-March 1979. The network was deployed as pan of the Rivera Ocean Seismic Experiment, also known as Project ROSE. The Orozco Fracture Zone is physiographically complex, and the pattern of microeanhquake hypocenters at least partly reflects this complexity. All of the well-located epicenters lie within the active transform fault segment of the fracture zone. About lialf of the recorded earthquakes were aligned along a narrow trough that extends eastward from the northern rise crest intersection in the approximate direction of the Cocos-Pacific relative plate motion; these events appear to be characterized by strike-slip faulting. The second major group of activity occurred in the central portion of the transform fault; the microearthquakes in this group do not display a preferred alignment parallel to the direction of spreading, and several are not obviously associated with distinct topographic features. Hypocentral depth was well resolved for many of the earthquakes reported here. Nominal depths range from 0 to 17 km below the seafloor.
    Description: Prepared for the Office of Naval Research under Contract N00014-79-C-0071; NR 083-004.
    Keywords: Natural disasters ; Seismology
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
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    A geophysical survey within the Mesozoic magnitic anomaly sequence south of Bermuda (2018)
    Woods Hole Oceanographic Institution
    Details
    Publication Date: 2022-05-26
    Description: Also published as: Journal of Geophysical Research 84 (1979): 5487-5496
    Description: This geophysical survey of an approximate 1° square covers Mesozoic magnetic anomalies M0, M2, and M4 south of Bermuda. Bathymetry, magnetics, seismic reflection profiling, and seismic refraction data are presented. The isochron trend within the survey area at magnetic anomaly M4 time is 025°. Two left lateral fracture zones exist: the southern fracture zone has an offset of 〈10 km at M4 time and 33 km at M0 time. The northern fracture zone has an offset of 37 km at M4 time and 26 km at M0 time. These changes in offset are accounted for by asymmetric spreading, an 11° change in trend of anomaly M0 relative to M4, and by M0 time, growth of a small right lateral fracture zone. Seismic refraction data provide poor control on the shallow crustal structure but suggest the presence of significant lateral inhomogeneities within layer 2.
    Description: Prepared for the Office of Naval Research under Contract N00014-74-C-0262; NR 083-004.
    Keywords: Submarine geology ; Seismology
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
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    Rupture evolution of the 2006 Java tsunami earthquake and the possible role of splay faults (2018)
    Details
    Publication Date: 2022-05-26
    Description: Author Posting. © The Author(s), 2017. This is the author's version of the work. It is posted here under a nonexclusive, irrevocable, paid-up, worldwide license granted to WHOI. It is made available for personal use, not for redistribution. The definitive version was published in Tectonophysics 721 (2017): 143-150, doi:10.1016/j.tecto.2017.10.003.
    Description: The 2006 Mw 7.8 Java earthquake was a tsunami earthquake, exhibiting frequency-dependent seismic radiation along strike. High-frequency global back-projection results suggest two distinct rupture stages. The first stage lasted ~65 s with a rupture speed of ~1.2 km/s, while the second stage lasted from ~65 to 150 s with a rupture speed of ~2.7 km/s. High-frequency radiators resolved with back-projection during the second stage spatially correlate with splay fault traces mapped from residual free-air gravity anomalies. These splay faults also colocate with a major tsunami source associated with the earthquake inferred from tsunami first-crest back-propagation simulation. These correlations suggest that the splay faults may have been reactivated during the Java earthquake, as has been proposed for other tsunamigenic earthquakes, such as the 1944 Mw 8.1 Tonankai earthquake in the Nankai Trough.
    Description: W.F. is currently supported by the Postdoctoral Scholar Program at the Woods Hole Oceanographic Institution, with funding provided by the Weston Howland Jr. Postdoctoral Scholarship.
    Keywords: Earthquake ; Tsunami ; Back-projection ; Splay faults ; Java ; Seismology
    Repository Name: Woods Hole Open Access Server
    Type: Preprint
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    Evaluation of Low Noise Integration Concepts and Propulsion Technologies for Future Supersonic Civil Transports (2018)
    In:  CASI
    Details
    Publication Date: 2019-05-16
    Description: This report covers the entire effort of GE Global Research's NASA Prime Contract NNC15CA02C "Evaluation of Low Noise Integration Concepts and Propulsion Technologies for Future Supersonic Civil Transports". GE Global Research was supported by GE Aviation and Lockheed Martin in exploring the potential of wing shielding, flight path optimization, and jet noise technology to target aggressive community noise levels of 10 EPNdB lower than Chapter 14 for a future (mid-term) commercial supersonic transport aircraft.
    Keywords: Aircraft Design, Testing and Performance
    Type: NASA/CR-2018-219936 , E-19550 , GRC-E-DAA-TN49515
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    Blunt-Body Paradox and Improved Application of Transient-Growth Framework (2018)
    In:  CASI
    Details
    Publication Date: 2019-06-22
    Description: The Reshotko-Tumin transition criterion" based on optimal transient growth successfully correlates laboratory measurements of roughness induced transition over blunt body configurations. Even though transient growth has not been conclusively linked to the measured onset of transition, the above correlation denotes the only available physics-based model for subcritical transition in blunt body flows, since the latter do not support any modal instabilities at typical experimental conditions. Unlike other established models based on empirical curve fits that are valid for a specific subclass of datasets, the optimal-growth-based transition criterion appears to provide a reasonable correlation with measurements in various wind tunnel and ballistic range facilities and for a broad range of surface temperature ratios. This paper is focused on optimal growth calculations that improve upon significant shortcomings of the computations underlying the Reshotko-Tumin correlation. The improved framework is applied to leeward transition over a spherical section forebody that was tested in the Mach 6 Adjustable Contour Expansion wind tunnel at Texas A&M University. The computed results highlight the significance of nonparallel basic state evolution, curvature terms, and an optimization procedure that varies both inflow and outflow locations of the transient growth interval. More important, the results indicate that the modified correlation is very close to its original form, and hence, that the accuracy of the transient-growth-based transition criterion is not compromised by using a more thorough theoretical framework. Yet the results also show that the optimal energy gain up to the predicted transition onset location can be rather small, highlighting the need to further investigate the optimal growth criterion for additional experimental configurations and to also uncover the in-depth physics underlying blunt body transition.
    Keywords: Aircraft Design, Testing and Performance
    Type: NF1676L-27837 , AIAA Journal (ISSN 0001-1452) (e-ISSN 1533-385X); 56; 7; 2604-2614
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    A VTOL Small Unmanned Aircraft System to Expand Payload Capabilities (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: One of the goals of Unmanned Aerial Systems (UAS) is to increase the capabilities of flight vehicles while maintaining small airframes that are also lightweight. Private package delivery companies and government agencies have an interest in vehicles that have large payload to weight ratios; thus allowing to deliver heavy payloads. Currently, UAS configurations suffer from propulsive and aerodynamic limitations that decrease the payload weight and/or mission range. In order to decrease these limitations, the Kinetic and Potential Energy Alternation for Greater Lift Enhancement (KP EAGLE) concept provides a novel way to transport payloads that may be too heavy for vehicles in a similar weight class. The concept vehicle takes off vertically without the payload. It then performs a dive maneuver that transfers the gained potential energy into kinetic energy to pick up the payload. This concept does not require special equipment during takeoff or landing and provides a better payload to weight ratio than other conventional vehicles in the same weight class.
    Keywords: Aircraft Design, Testing and Performance
    Type: NF1676L-27630 , Congress of the International Council of the Aeronautical Sciences; Sep 09, 2018 - Sep 14, 2018; Belo Horizonte; Brazil
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    Vehicle-Level System Impact of Boundary Layer Ingestion for the NASA D8 Concept Aircraft (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The purpose of this study was to evaluate the vehicle-level impact of a boundary layer ingestion (BLI) propulsion system on a commercial transport aircraft concept. The NASA D8 (ND8) aircraft was chosen as the BLI concept aircraft to be studied. A power balance methodology developed by the Massachusetts Institute of Technology was adapted for use with the existing NASA sizing and performance tools to model the fuel consumption impact of BLI on the ND8. A key assumption for the BLI impact assessment was a 3.5% efficiency penalty associated with designing a fan for and operating in the distorted flow caused by BLI. The ND8 was compared to several other ND8-like aircraft that did not utilize BLI in order to determine the fuel consumption benefit attributable to BLI. Analytically turning off BLI on the ND8 without accounting for the physical requirements of redirecting the boundary layer or resizing the aircraft to meet the performance constraints resulted in a 2.8% increase in block fuel consumption to fly the design mission. When this non-physical aircraft was resized to meet the performance constraints, the block fuel consumption was 4.0% greater than the baseline ND8. The ND8 was also compared to an ND8-like aircraft with conventionally podded engines under the wing. This configuration had a 5.6% increase in block fuel consumption compared to the baseline ND8. This result is more reflective of the real world impact if BLI is not an available technology for the ND8 design. The BLI benefit results presented for this study should not be applied to other aircraft that have a propulsion-airframe integration design or BLI implementation different from the ND8.
    Keywords: Aircraft Design, Testing and Performance
    Type: NF1676L-27422 , AIAA Science and Technology Forum and Exposition; Jan 08, 2018 - Jan 12, 2018; Kissimmee, FL; United States
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    NDARC NASA Design and Analysis of Rotorcraft - Theory, Appendix 7 (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: The NASA Design and Analysis of Rotorcraft (NDARC) software is an aircraft system analysis tool that supports both conceptual design efforts and technology impact assessments. The principal tasks are to design (or size) a rotorcraft to meet specified requirements, including vertical takeoff and landing (VTOL) operation, and then analyze the performance of the aircraft for a set of conditions. For broad and lasting utility, it is important that the code have the capability to model general rotorcraft configurations, and estimate the performance and weights of advanced rotor concepts. The architecture of the NDARC code accommodates configuration flexibility, a hierarchy of models, and ultimately multidisciplinary design, analysis, and optimization. Initially the software is implemented with low-fidelity models, typically appropriate for the conceptual design environment. An NDARC job consists of one or more cases, each case optionally performing design and analysis tasks. The design task involves sizing the rotorcraft to satisfy specified design conditions and missions. The analysis tasks can include off-design mission performance calculation, flight performance calculation for point operating conditions, and generation of subsystem or component performance maps. For analysis tasks, the aircraft description can come from the sizing task, from a previous case or a previous NDARC job, or be independently generated (typically the description of an existing aircraft). The aircraft consists of a set of components, including fuselage, rotors, wings, tails, and propulsion. For each component, attributes such as performance, drag, and weight can be calculated; and the aircraft attributes are obtained from the sum of the component attributes. Description and analysis of conventional rotorcraft configurations is facilitated, while retaining the capability to model novel and advanced concepts. Specific rotorcraft configurations considered are single-main-rotor and tail-rotor helicopter, tandem helicopter, coaxial helicopter, and tiltrotor. The architecture of the code accommodates addition of new or higher-fidelity attribute models for a component, as well as addition of new components.
    Keywords: Aircraft Design, Testing and Performance
    Type: NASA/TP-2015-218751 , ARC-E-DAA-TN56287
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    Summary of Pressure Gain Combustion Research at NASA (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: NASA has undertaken a systematic exploration of many different facets of pressure gain combustion over the last 25 years in an effort to exploit the inherent thermodynamic advantage of pressure gain combustion over the constant pressure combustion process used in most aerospace propulsion systems. Applications as varied as small-scale UAV's, rotorcraft, subsonic transports, hypersonics and launch vehicles have been considered. In addition to studying pressure gain combustor concepts such as wave rotors, pulse detonation engines, pulsejets, and rotating detonation engines, NASA has studied inlets, nozzles, ejectors and turbines which must also process unsteady flow in an integrated propulsion system. Other design considerations such as acoustic signature, combustor material life and heat transfer that are unique to pressure gain combustors have also been addressed in NASA research projects. In addition to a wide range of experimental studies, a number of computer codes, from 0-D up through 3-D, have been developed or modified to specifically address the analysis of unsteady flow fields. Loss models have also been developed and incorporated into these codes that improve the accuracy of performance predictions and decrease computational time. These codes have been validated numerous times across a broad range of operating conditions, and it has been found that once validated for one particular pressure gain combustion configuration, these codes are readily adaptable to the others. All in all, the documentation of this work has encompassed approximately 170 NASA technical reports, conference papers and journal articles to date. These publications are very briefly summarized herein, providing a single point of reference for all of NASA's pressure gain combustion research efforts. This documentation does not include the significant contributions made by NASA research staff to the programs of other agencies, universities, industrial partners and professional society committees through serving as technical advisors, technical reviewers and research consultants.
    Keywords: Aircraft Design, Testing and Performance
    Type: NASA/TM-2018-219874 , E-19499 , GRC-E-DAA-TN53528
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    A Geofence Violation Prevention Mechanism for Small UAS (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The ability to safely confine the trajectories of small UAS to a specific geographical area is a key enabler for capabilities that require operating in close proximity to populated areas as well as other users of the airspace. These capabilities require highly reliable geofencing algorithms. In particular, these algorithms must promptly alert imminent breaches of keep-in/keep-out geofences by considering factors such as the vehicle speed and uncertainties in the state of the aircraft. This paper presents a novel approach to the prevention of geofence boundary violation based on closure rate constraints. These constraints are incorporated into a control framework to effectively prevent fence breaches. Simulation results illustrating an example use case of this framework are presented.
    Keywords: Aircraft Design, Testing and Performance
    Type: NF1676L-27651 , Congress of the International Council of the Aeronautical Sciences; Sep 09, 2018 - Sep 14, 2018; Belo Horizonte; Brazil
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  • 85
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    NEAT Summary and Update (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Overview of NEAT testbed for general audience with updates based on 2018 work performed.
    Keywords: Aircraft Design, Testing and Performance
    Type: GRC-E-DAA-TN59863 , Pratt & Whitney TIM; Aug 22, 2018; Cleveland, Ohio; United States
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  • 86
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    Sizing and Layout Design of an Aeroelastic Wingbox Through Nested Optimization (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The goals of this work are to 1) develop an optimization algorithm that can simultaneously handle a large number of sizing variables and topological layout variables for an aeroelastic wingbox optimization problem and 2) utilize this algorithm to ascertain the benefits of curvilinear wingbox components. The algorithm used here is a nested optimization, where the outer level optimizes the rib and skin stiffener layouts with a surrogate-based optimizer, and the inner level sizes all of the components via gradient-based optimization. Two optimizations are performed: one restricted to straight rib and stiffener components only, the other allowing curved members. A moderate 1.18% structural mass reduction is obtained through the use of curvilinear members.
    Keywords: Aircraft Design, Testing and Performance
    Type: NF1676L-27424 , AIAA SciTech Forum 2018; Jan 08, 2018 - Jan 12, 2018; Kissimmee, FL; United States
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    Simulations of a Full-Scale Aircraft with Installed Airframe Noise Reduction Technologies (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Computational results are presented for a high-fidelity, full-scale, full-span Gulfstream G-III aircraft model equipped with flap and main landing gear (MLG) noise reduction technologies. The simulations, which were conducted in support of a NASA airframe noise flight test campaign of the same technologies, use the lattice Boltzmann solver PowerFLOW to capture time-accurate flow data with sound propagation to the far field accomplished using a Ffowcs-Williams and Hawkings (FWH) acoustic analogy approach. The aerodynamic and aeroacoustic behavior of the aircraft were investigated in the approach configuration with combinations of flap and landing gear deployments. The simulated flap concept is an Adaptive Compliant Trailing Edge (ACTE) flap that replaces the Fowler flap system on the G-III aircraft. The simulated MLG noise reduction concept is comprised of porous fairings and a collection of other smaller fairings fitted around the flow-facing components. Using the Fowler flap results as a reference, comparisons are presented on the noise reduction effectiveness of the ACTE flap system. Investigations were made on the effects of using the porous fairings and ACTE flap as noise reduction concepts in tandem. The ACTE flap was found to reduce the total airframe noise level at all flap deflection angles when compared to the Fowler flap equipped model. As anticipated, a reduction in aerodynamic performance was also found when the ACTE flap system was used. The MLG fairings were shown to further reduce the total airframe noise level of the G-III.
    Keywords: Aircraft Design, Testing and Performance
    Type: NF1676L-28741 , AIAA Aviation and Aeronautics Forum (Aviation 2018); Jun 25, 2018 - Jun 29, 2018; Atlanta, GA; United States|AIAA/CEAS Aeroacoustics Conference; Jun 25, 2018 - Jun 29, 2018; Atlanta, GA; United States
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    Operator Trust Function for Predicted Drone Arrival (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: To realize the full benefit from autonomy, systems will have to react to unknown events and uncertain dynamic environments. The resulting number of behaviors is essentially infinite; thus, the system is effectively non-deterministic but an operator needs to understand and trust the actions of the autonomous vehicles. This research began to tackle non-deterministic systems and trust by beginning to develop a user trust function based on intent information displayed and the prescribed bounds on allowable behaviors/actions of the non-deterministic system. Linear regression shows promise on being able to predict a persons confidence of the machines prediction. Linear regression techniques indicated that subject characteristics, scenario difficulty, the experience with the system, and confidence earlier in the scenario account for approximately 60% of the variation in confidence ratings. This paper details the specifics of the liner regression model essentially a trust function for predicting a persons confidence.
    Keywords: Aircraft Design, Testing and Performance
    Type: NF1676L-28528 , International Conference on Applied Human Factors and Ergonomics (AHFE 2018); Jul 21, 2018 - Jul 25, 2018; Orlando, FL; United States
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    A Learn-To-Fly Approach for Adaptively Tuning Flight Control Systems (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: A method is presented for adaptively tuning feedback control gains in a ight control sys- tem to achieve desired closed-loop performance. The method combines efficient parameter estimation for identifying closed-loop dynamics models, with online nonlinear optimization for sequentially perturbing and updating control gains to improve performance. Prior in- formation on stability and control derivatives is not needed, nor is any knowledge about the control system architecture. Following convergence, the optimized control gains (with uncertainties), the open-loop dynamics model, and the closed-loop dynamics model are available. The method is demonstrated for tuning a longitudinal stability augmentation system using a realistic nonlinear ight dynamics simulation of the NASA FASER airplane. Convergence was attained using five piloted maneuvers that spanned approximately one minute of ight test time. Although demonstrated for a relatively simple case, the method is general and can be applied to other aircraft, axes, performance metrics, and control systems.
    Keywords: Aircraft Design, Testing and Performance
    Type: NF1676L-28514 , AIAA Aviation Forum 2018; Jun 25, 2018 - Jun 29, 2018; Atlanta, GA; United States
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  • 90
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    Preliminary Test Results for Stability and Control Characteristics of a Generic T-Tail Transport Airplane at High Angle of Attack (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Tests of a generic T-tail transport airplane, in flaps-up configuration, were conducted using two wind tunnels, a water tunnel, and computational fluid dynamics. Static force and moment testing, forced oscillation testing and dye flow visualization test techniques were used. The purpose of the testing was to obtain stability and control characteristics for development of a research flight simulator aerodynamic database. The purpose of that database was for assessment of aerodynamic model fidelity requirements to train airline pilots to recognize and recover from full stall conditions. Preliminary results, at initial stall conditions, include: an unstable stall pitch break, and near-neutral roll damping. Preliminary results, at deep stall conditions, include: a potential static longitudinal trim condition at approximately 35 degrees angle of attack, large aerodynamic asymmetries, and localized unstable dynamic stability.
    Keywords: Aircraft Design, Testing and Performance
    Type: NF1676L-27400 , AIAA Science and Technology Forum and Exposition; Jan 08, 2018 - Jan 12, 2018; Kissimmee, FL; United States
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    Comparison of Aircraft Conceptual Design Weight Estimation Methods to the Flight Optimization System (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Weight estimation is critical in the aircraft conceptual design process. The Flight Optimization System (FLOPS) is an aircraft conceptual design tool that has been the primary aircraft synthesis software used by the Systems Analysis and Concepts Directorate at NASA Langley Research Center. FLOPS includes multiple modules that represent aircraft design disciplines. The FLOPS weight module includes estimation methods that are similar in nature to other regression based aircraft preliminary weight estimation methods, however the FLOPS methods were created to use a minimum number of input parameters to limit the effort required by the designer to apply it. As FLOPS has recently been made publically available, this work compares the FLOPS weight estimation methods with several similar methods with the goal of explaining the differences in FLOPS, providing conceptual designers with a brief introduction to the method before attempting to apply it, and providing a reference to inform the development of future weight estimating relationships. In this paper, the Boeing 737-200 is used as a test case to highlight to differences and similarities in the methods.
    Keywords: Aircraft Design, Testing and Performance
    Type: NF1676L-27388 , AIAA Science and Technology Forum and Exposition; Jan 08, 2018 - Jan 12, 2018; Kissimmee, FL; United States
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    Analysis of Influence of UAS Speed Range and Turn Performance on Detect and Avoid Sensor Requirements (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: In support of NASAs Unmanned Aircraft Systems Integration in the National Airspace System project and RTCA Special Committee 228, an analysis has been performed to provide insight in to the trade space between unmanned aircraft speed and turn capability and detect and avoid sensor range requirements. The work was done as an initial part of the effort to understand low size, weight, and power sensor requirements for aircraft that have a limited speed envelope or can limit the envelope for portions of their mission and may be able to turn at higher than standard rate. Range and timeline reductions coming from limiting speed range and from increasing available turn rate in some speed ranges are shown.
    Keywords: Aircraft Design, Testing and Performance
    Type: NF1676L-28544 , 2018 AIAA Aviation Forum; Jun 25, 2018 - Jun 29, 2018; Atlanta, GA; United States
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  • 93
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    System Engineering Principles of Complexity (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: No abstract available
    Keywords: Aircraft Design, Testing and Performance
    Type: M18-6863 , AIAA Electric Aircraft Technologies Symposium; Jul 09, 2018 - Jul 11, 2018; Cincinnate, OH; United States
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  • 94
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    Determination of Ballistic Limit for IM7/8552 Using LS-DYNA MAT 261 (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The goal of the NASA ACC High Energy Dynamic Impact Project is to determine the state of the art of dynamic fracture simulations for high velocity impact for composite fuselage shielding applications. Using a building block approach, several computational models considered under NASA ACC are being validated against test data, starting at unconfigured panels and progressing to configured panels under combined out-of-plane and in-plane loading due to ballistic impact. The computational models being evaluated in this project include MAT 162, MAT 213, MAT 261, SPG, and Peridynamics. In this paper, the simulation results using LS-Dyna Material MAT 261 are presented. In particular, a series of blind predictions for unconfigured panels were performed to determine the ballistic limit or V50 velocity. MAT 261 employs failure approach that is generally physically-based using fracture toughness criteria. The overall material model relies on typical ply-level stiffness properties, similar to MAT 162 and other composite continuum damage material models. The fracture toughness values are based on standard tests, and thus are not subject to extensive calibration. This approach is more efficient than performing extensive optimization studies for calibration of parameters. Also, this approach of relying on physical properties reduces the uncertainty of results, as questions concerning the quality and extent of the calibration studies is no longer relevant. However, it was found that carefully controlled coupon-level tests are needed to accurately obtain the required fracture toughness values. Additionally, it should be noted that there is one significant parameter in MAT 261 that does appear to require calibration, and that is the overall failure strain. This is the strain at which the element is deleted, and is not the same as the strain at which damage begins to accumulate. This failure strain is termed EFS (Effective Failure Strain), and is the maximum effective stain for element failure. Simulations have shown that this value will significantly affect impact response and failure. The paper presents the effect of this element failure strain parameter, along with possible uncertainties in fracture toughness values. With an adjusted appropriate value for EFS, it is seen that simulation results compare well with impact test data for predicted penetration velocity.
    Keywords: Aircraft Design, Testing and Performance
    Type: AIAA 2018-1702 , NF1676L-27566 , 2018 AIAA SciTech Forum; Jan 08, 2018 - Jan 12, 2018; Kissimmee, FL; United States
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  • 95
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    Sensor Arrays for Aerospace Vehicles (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Advances in highly scalable sensors, wireless networks, distributed computing and data fusion algorithms enable significant improvements in high-level information-centric state determination for adaptable and autonomous aerospace vehicles. The objective is to increase insight into structural response of space vehicles and insight into the aerodynamics of new aircraft.
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN57624 , Ames Innovation Fair; Jun 14, 2018; Moffett Field, CA; United States
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  • 96
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    On the Minimum Induced Drag of Wings (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: This presentation on 1933 Prandtl applications to a small research UAV. We will discuss the implications of 1933 Prantl, connections to Horten, our discovery of how this reveals the mechanisms used by the flight of birds, and our recent work on FOSS and pressures on the wing.
    Keywords: Aircraft Design, Testing and Performance
    Type: AFRC-E-DAA-TN57433 , Pacific Division AAAS Annual Meeting; Jun 12, 2018 - Jun 15, 2018; Pomona, CA; United States
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  • 97
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    Experimental Measurements of Passenger Ride Quality During Aircraft Wake Surfing (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The National Aeronautics and Space Administration (NASA) Armstrong Flight Research Center completed a series of research flights to better understand the challenges of aircraft wake surfing using civilian airplanes and commercial avionics. Airlines and air cargo carriers have identified uncertainty about increased passenger/crew discomfort due to noise and vibrations as a potential obstacle to the widespread adoption of aircraft wake surfing. To measure the effects of wake surfing on passenger ride quality, NASA instrumented a business jet with cabin noise and vibration sensors. The airplane was then flown under control of an experimental autopilot at multiple locations within the wake of a similar airplane. This paper presents a summary of the measurements collected on those flights, an assessment of passenger discomfort correlated with wake surfing performance benefits, and qualitative evaluations collected from passengers aboard during the research flights.
    Keywords: Aircraft Design, Testing and Performance
    Type: AFRC-E-DAA-TN53958 , 2018 AIAA/CEAS Aeroacoustics Conference; Jun 25, 2018 - Jun 29, 2018; Atlanta, GA; United States
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  • 98
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    Best Practices for Training the Structures Flight Test Engineer (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The Structures Flight from 412th Test Wing and the Aerostructures Branch at NASA Armstrong Flight Research Center at Edwards Air Force Base have developed a set of best practices for training a structures flight test engineer. These practices represent the hard-won lessons learned and best practices from training generations of engineers to perform high risk envelope expansion and developmental flight test. Collectively, these organizations have tested many of the world's most advanced and innovative aircraft, including the B-2, C-17, F-22, F-35, RQ-4, X-29, F-18 High Angle of Attack Research Vehicle, X-53, G-III Adaptive Compliant Trailing Edge, and X-56.
    Keywords: Aircraft Design, Testing and Performance
    Type: AFRC-E-DAA-TN56429 , Aviation 2018; Jun 25, 2018 - Jun 29, 2018; Atlanta, GA; United States
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    Mars Helicopter Technology Demonstrator (2018)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Aerial exploration of Mars with helicopters could provide mission capabilities that go beyond that of orbiting satellites, landed spacecraft and rovers. Helicopters allow examination of Mars at visual resolutions comparable to landers and rovers but over much longer ranges. They could access and land at designated targets in a controlled manner and could be used to carry or retrieve small payloads. Helicopters could enhance rover missions by quickly scouting out safe traverse routes or providing reconnaissance on possible science target destinations and, as standalone systems, could be used to explore areas that may not be reachable by rovers. Mars helicopters may also be considered as elements of a sample return architecture where they could be used for timely retrieval of small science samples back to a Mars ascent vehicle for return to Earth. The challenge to helicopter use on Mars is the thin carbon dioxide atmosphere with approximately 1% of the density of Earths atmosphere. Much like the Sojourner rover on the Pathfinder mission paved the way for the Spirit, Opportunity, Curiosity and the Mars 2020 rovers, an initial demonstration on Mars is desirable so as to inform the development of future helicopter missions. The Jet Propulsion Laboratory is leading a collaborative effort with AeroVironment Inc., and NASA centers Ames, Langley and Glenn to develop a small helicopter as a technology demonstrator. In this paper we briefly describe the results of this effort including results from controlled free-flight of a full-scale (approx 850 g) prototype flown in a test chamber under Mars conditions, the design and development of the 1800 g (not-to-exceed mass) technology demonstrator helicopter, and the operation of the helicopter.
    Keywords: Aircraft Design, Testing and Performance
    Type: JPL-CL-CL#17-6243 , AIAA Science and Technology Forum and Exposition (AIAA SciTech 2018); Jan 08, 2018 - Jan 12, 2018; Kissimmee, FL; United States
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    Analytical Performance, Loads, and Aeroelastic Stability of a Full-Scale Isolated Proprotor (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The prediction of the performance and loads of a full-scale isolated proprotor and the calculation of whirl flutter stability of the rotor installed in a wind tunnel are considered in this study. The comprehensive analysis CAMRAD II is used. The test article is a research proprotor based on the Bell 609 rotor and the wind tunnel test apparatus is the newly developed Tiltrotor Test Rig (TTR) installed in the USAF NFAC 40- by 80-Foot Wind Tunnel. The performance and loads predictions and the stability calculations cover the following operating conditions: hover, cruise, conversion, and helicopter mode. These pre-test analytical results are being obtained to identify test operating limits, ensure a safe wind tunnel test and predict test results. Eventually, the goal is to perform a correlation study, identify shortfalls in the analytical model and introduce improvements to the analytical model. Performance and loads test results to date show that rotor torque (and yoke lag moment) may limit the test envelope. Shake test data based stability analysis shows that the TTR/609 is solidly stable within the test envelope.
    Keywords: Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN50737 , AHS Specialist''s Conference on Aeromechanics Design for Transformative Vertical Flight; Jan 16, 2018 - Jan 18, 2018; San Francisco, CA; United States
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