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  • 1
    Monograph available for loan
    Monograph available for loan
    Berlin ; New York : Walter de Gruyter
    Call number: 6/M 12.0228 ; M 12.0232 ; M 19.19080
    Description / Table of Contents: The fourth edition of this textbook has been thoroughly revised in order to reflect the central role which geodesy has achieved in the past ten years. It follows the principal directions of geodesy, providing the theoretical background as well as the principles of measurement and evaluation methods.
    Type of Medium: Monograph available for loan
    Pages: X, 433 S. : Ill., graph. Darst.
    Edition: 4th ed.
    ISBN: 9783110207187
    Classification:
    Geodesy
    Location: Reading room
    Location: Upper compact magazine
    Location: Upper compact magazine
    Branch Library: GFZ Library
    Branch Library: GFZ Library
    Branch Library: GFZ Library
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  • 2
    Call number: S 99.0125(315)
    In: Deutsche Geodätische Kommission bei der Bayerischen Akademie der Wissenschaften
    Type of Medium: Series available for loan
    Pages: 172 S. + 1CD-ROM
    ISBN: 3769685954
    Series Statement: Deutsche Geodätische Kommission bei der Bayerischen Akademie der Wissenschaften : Reihe B, Angewandte Geodäsie 315
    Classification:
    A.1.1.
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 3
    Call number: SR 99.0139(36)
    In: Wissenschaftliche Arbeiten der Fachrichtung Vermessungswesen der Universität Hannover
    Type of Medium: Series available for loan
    Pages: 120 S.
    Series Statement: Wissenschaftliche Arbeiten der Lehrstühle für Geodäsie, Photogrammetrie und Kartographie an der Technischen Universität Hannover 36
    Language: German
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 4
    Call number: S 99.0139(348)
    In: Wissenschaftliche Arbeiten der Fachrichtung Vermessungswesen der Universität Hannover
    Type of Medium: Series available for loan
    Pages: 145 Seiten , Illustrationen, Diagramme, Karten
    ISSN: 0174-1454
    Series Statement: Wissenschaftliche Arbeiten der Fachrichtung Vermessungswesen der Universität Hannover Nr. 348
    Language: English
    Note: Dissertation, Gottfried Wilhelm Leibniz Universität Hannover, 2018 , Introduction 1.1 Synthetic Aperture Radar from Spaceborne Remote Sensing 1.2 Satellite-Based Monitoring of the Terrestrial Water Cycle 1.3 Remote Sensing of Water Storage in Central Asia 1.4 GFZ Activities in Central Asia and Study Areas in Kyrgyzstan 1.5 Research Objectives 1.6 Outline and Structure of the Thesis 2 Fundamentals of Synthetic Aperture Radar Remote Sensing 2.1 SAR Satellite Data 2.2 SAR Satellite Missions 2.3 Interferometric SAR 2.4 DInSAR Time Series with PSI 2.5 DInSAR Time Series with SBAS 2.6 Feature Tracking 3 State of the Art 3.1 Inter- and Intra-Annual Glacier Surface Velocities from SAR Data 3.2 Inter- and Intra-Annual Glacier Elevation Changes from SAR Data 3.3 Inter- and Intra-Annual Loading-Induced Crustal Deformations at Water Reservoirs from SAR Data 4 Quantification of Inylchek Glacier Surface Kinematics 4.1 Abstract 4.2 Introduction 4.3 Inylchek Glacier 4.4 Data and Methodology 4.4.1 TerraSAR-X Data Set 4.4.2 Feature Tracking 4.4.3 Decomposition to 3D Velocities 4.5 Results 4.6 Discussion 4.6.1 Error Estimation 4.6.2 Inter-Annual Kinematics of the Upper Southern Inylchek Glacier Branch .... 4.6.3 Lake Level Extent and GLOF 4.7 Conclusions 4.8 Acknowledgements 4.9 Author Contribution 5 Quantification of Inylchek Glacier Elevation Changes 5.1 Abstract 5.2 Introduction 5.3 Data 5.3.1 TanDEM X Data 5.3.2 External DEMs 5.3.3 Glacier Outlines of Inylchek 5.4 Methodology 5.4.1 Interferometric Processing of TanDEM-X Data 5.4.2 Alignment of the SRTM and TDX DEMs 5.4.3 Radar Penetration Correction 5.4.4 DEM Elevation Difference Calculation 5.4.5 Accuracy Assessment 5.5 Results and Discussion 5.5.1 Uncertainty of Measurements 5.5.2 DEM Alignment Quality 5.5.3 Inylchek Elevation Changes 5.6 Conclusions 5.7 Acknowledgements 5.8 Author Contribution 6 Quantification of Toktogul Water-Level-Induced Ground Deformations 6.1 Abstract 6.2 Introduction 6.3 Materials and Methods 6.3.1 Lake Altimetry 6.3.2 DInSAR processing of Envisat ASAR and Sentinel-1 Data 6.3.3 Atmospheric Correction 6.3.4 Deformation Decomposition of SentineH Data 6.3.5 Modelling of Elastic Surface Deformations 6.4 Results 6.4.1 Atmospheric Corrections 6.4.2 Ground Deformation 6.5 Discussion 6.5.1 Atmospheric Corrections 6.5.2 Ground Deformation 6.6 Conclusions 6.7 Acknowledgments 6.8 Author Contribution 7 Subsequent Work 7.1 Scope of the Chapter 7.2 GNSS-derived Inylchek Glacier Surface Kinematics 7.2.1 Abstract 7.2.2 Author Contribution 7.3 Monitoring of Lake Merzbacher's GLOF Event 7.3.1 Abstract 7.3.2 Author Contribution 7.4 Ongoing Work at GFZ Based on the Results of this Thesis 8 Summary and Outlook 8.1 Summary of Main Results 8.1.1 Methodological Aspects 8.1.2 Monitoring of Short-Time Changes 8.2 Outlook Bibliography
    Location: Lower compact magazine
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  • 5
    Call number: S 99.0139(332)
    In: Wissenschaftliche Arbeiten der Fachrichtung Geodäsie und Geoinformatik der Leibniz Universität Hannover, Nr. 332
    Type of Medium: Series available for loan
    Pages: x, 199 Seiten , Illustrationen, Diagramme
    ISSN: 0174-1454
    Series Statement: Wissenschaftliche Arbeiten der Fachrichtung Geodäsie und Geoinformatik der Leibniz Universität Hannover Nr. 332
    Language: German
    Note: Dissertation, Gottfried Wilhelm Leibniz Universität Hannover, 2017 , Inhaltsverzeichnis Inhaltsverzeichnis 1 Einleitung 1.1 Motivation 1.2 Stand der Forschung 1.3 Zielsetzung und Aufbau der Arbeit 2 Grundlagen 2.1 Grundlagen der physikalischen Geodäsie 2.1.1 Das Schwerefeld der Erde 2.1.2 Gravitationspotential - Kugelfunktionsentwicklung und Fehler 2.1.3 Ableitungen des Gravitationspotentials 2.1.4 Satellitengradiometrie 2.1.5 Zeiten 2.2 Ausgewählte Grundlagen der Statistik und digitalen SignalVerarbeitung 2.2.1 Deskriptive Statistik 2.2.2 Aspekte der digitalen Signalverarbeitung 2.2.3 Filterung 2.2.4 Spektralschätzung 2.3 Drehmatrizen, Eulerwinkel und Quaternionen 2.4 Methodische Grundlagen der Kreuzungspunktanalyse 2.4.1 Bestimmung von Kreuzungspunkten 2.4.2 Kreuzungspunktposition und Interpolationen 3 Die GOCE-Mission 3.1 Wahl des GOCE-Orbits 3.2 Gradiometer und Gravitationsgradienten 3.2.1 Gradiometeraufbau und Beschleunigungsmesser 3.2.2 Gravitationsgradienten aus Beschleunigungsdifferenzen 3.2.3 Einschränkungen und Fehler des Gradiometers 3.3 Weiteres Instrumentarium im GOCE-Satelliten 3.4 Koordinatensysteme und Transformationen 3.4.1 GOCE-relevante Koordinatensysteme 3.4.2 Transformationen zwischen Koordinatensystemen 3.5 Datenprodukte und deren Genauigkeiten 4 Genauigkeitsanforderungen an Datenprodukte und Rechenoperationen 4.1 Analyse der GOCE-Gravitationsgradienten 4.1.1 Gradienten und Fehler in Zeit- und Frequenzbereich 4.1.2 Vergleich der Gradienten mit globalen Gravitationsfeldmodellen 4.2 Abschätzung der Genauigkeit der Gravitationsgradienten 4.3 Bestimmung der Genauigkeitsanforderungen 5 Methodik zur Gradienten-Validierung in Kreuzungspunkten 5.1 Übersicht zum Ablauf der Validierung 5.2 Kreuzungspunktbestimmung 5.2.1 Ziele und Methodik 5.2.2 Beschreibung des Algorithmus und Implementierung 5.3 Interpolation der Beobachtungsgrößen 5.3.1 Interpolation der reduziert-dynamischen Positionen 5.3.2 Interpolation der finalen Kreuzungspunktpositionen 5.3.3 Interpolation weiterer Datenprodukte im Kreuzungspunkt 5.4 Vergleichskoordinatensystem 5.5 Transformation des Tensors der GOCE-Gravitationsgradienten 5.5.1 Rotation des GOCE-GGT (Einfügen modellbasierter Vij, Filterung) 5.5.2 Translation des Tensors der GOCE-Gravitationsgradienten 5.5.3 Transformation und Diskussion 5.6 Closed-Loop-Test 6 Analyse der Kreuzungspunktdifferenzen 6.1 Einleitung 6.2 Qualität des Gesamtdatensatzes 6.2.1 Statistische Parameter 6.2.2 Korrelationen und Abhängigkeiten 6.3 Regionale Untersuchungen 6.4 Lokale Artefakte mit zeitlich begrenztem Einfluss auf die Gradienten 6.5 Zusammenfassung und Diskussion 7 Gradiometerkonzepte zukünftiger Schwerefeld-Satellitenmissionen 7.1 Missionsplanung und bisherige Studien 7.2 Gradiometriekonzepte und Technologien 7.2.1 Feste Testmassen und deren Lagebestimmung sowie Lageregelung 7.2.2 Atominterferometrie auf Basis kalter Atome 7.3 Kombinierte Beobachtungskonzepte und Bestimmung dritter Ableitungen 7.4 Zusammenfassung 8 Zusammenfassung und Ausblick Abkürzungsverzeichnis Literaturverzeichnis
    Location: Lower compact magazine
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  • 6
    Monograph available for loan
    Monograph available for loan
    Berlin : De Gruyter
    Call number: 6/M 23.95307
    Description / Table of Contents: The fifth edition of this textbook has been completely revised and significantly extended in order to reflect the revolution of geodetic technologies, methods and applications during the last decade. The Global Geodetic Observing System established by the IAG utilizes a variety of techniques to determine the geometric shape of the earth and its kinematics, the variations of earth rotation, and the earth’s gravity field. The societal importance of geodetic products was highlighted by the UN resolution on the Global Geodetic Reference Frame. In this context, both space and terrestrial techniques play a fundamental role. Recent space missions are monitoring climate-relevant processes such as mass transport in the Earth system and sea level changes. The analysis of the time variation of the geodetic products provides the link to neighboring geosciences and contributes to proper modelling of geodynamic processes. New satellite mission concepts and novel technologies such as quantum gravimetry and optical clocks show great potential to further improve the geodetic observing system in the future. The book especially addresses graduate students in the fields of geodesy, geophysics, surveying engineering, geomatics, and space navigation. It should also serve as a reference for geoscientists and engineers facing geodetic problems in their professional work. The book follows the principal directions of geodesy, providing the theoretical background as well as the principles of measurement and evaluation methods, which is enriched with numerous figures. An extensive reference list supports further studies.
    Type of Medium: Monograph available for loan
    Pages: XIII, 506 Seiten , Illustrationen, Diagramme, Karten
    Edition: 5th edition
    ISBN: 978-3-11-072329-8
    Series Statement: Graduate
    Language: English
    Location: Reading room
    Branch Library: GFZ Library
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  • 7
    Call number: S 99.0038(383)
    In: Deutsche Geodätische Kommission bei der Bayerischen Akademie der Wissenschaften
    Type of Medium: Series available for loan
    Pages: 132 S.
    ISBN: 3769694295
    Series Statement: Deutsche Geodätische Kommission bei der Bayerischen Akademie der Wissenschaften : Reihe C, Dissertationen 383
    Classification:
    Gravity Field
    Language: German
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 8
    Call number: S 99.0038(541)
    In: Deutsche Geodätische Kommission bei der Bayerischen Akademie der Wissenschaften
    Type of Medium: Series available for loan
    Pages: 87 S.
    ISBN: 3769695801
    Series Statement: Deutsche Geodätische Kommission bei der Bayerischen Akademie der Wissenschaften : Reihe C, Dissertationen 541
    Classification:
    A. 1.2.
    Language: German
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 9
    Publication Date: 2023-07-03
    Description: Absolute gravimeters are used in geodesy, geophysics and physics for a wide spectrum of applications. Stable gravimetric measurements over timescales from several days to decades are required to provide relevant insight into geophysical processes. Users of absolute gravimeters participate in comparisons with a metrological reference in order to monitor the temporal stability of the instruments and determine the bias to that reference. However, since no measurement standard of higher-order accuracy currently exists, users of absolute gravimeters participate in key comparisons led by the International Committee for Weights and Measures. These comparisons provide the reference values of highest accuracy compared to the calibration against a single gravimeter operated at a metrological institute. The construction of stationary, large-scale atom interferometers paves the way for a new measurement standard in absolute gravimetry used as a reference with a potential stability up to 1 nm/s 2 at 1 s integration time. At the Leibniz University Hannover, we are currently building such a very long baseline atom interferometer with a 10-m-long interaction zone. The knowledge of local gravity and its gradient along and around the baseline is required to establish the instrument’s uncertainty budget and enable transfers of gravimetric measurements to nearby devices for comparison and calibration purposes. We therefore established a control network for relative gravimeters and repeatedly measured its connections during the construction of the atom interferometer. We additionally developed a 3D model of the host building to investigate the self-attraction effect and studied the impact of mass changes due to groundwater hydrology on the gravity field around the reference instrument. The gravitational effect from the building 3D model is in excellent agreement with the latest gravimetric measurement campaign which opens the possibility to transfer gravity values with an uncertainty below the 10 nm/s2 level.
    Description: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Description: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Description: Bundesministerium für Bildung und Forschung http://dx.doi.org/10.13039/501100002347
    Description: Niedersächsisches Ministerium für Wissenschaft und Kultur http://dx.doi.org/10.13039/501100010570
    Description: https://www.bipm.org/kcdb
    Keywords: ddc:526 ; Atom interferometry ; Gravity acceleration ; Absolute gravimetry ; Gravimeter reference
    Language: English
    Type: doc-type:article
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  • 10
    Publication Date: 2023-07-03
    Description: Quantum optical technology provides an opportunity to develop new kinds of gravity sensors and to enable novel measurement concepts for gravimetry. Two candidates are considered in this study: the cold atom interferometry (CAI) gradiometer and optical clocks. Both sensors show a high sensitivity and long-term stability. They are assumed on board of a low-orbit satellite like gravity field and steady-state ocean circulation explorer (GOCE) and gravity recovery and climate experiment (GRACE) to determine the Earth’s gravity field. Their individual contributions were assessed through closed-loop simulations which rigorously mapped the sensors’ sensitivities to the gravity field coefficients. Clocks, which can directly obtain the gravity potential (differences) through frequency comparison, show a high sensitivity to the very long-wavelength gravity field. In the GRACE orbit, clocks with an uncertainty level of 1.0 × 10−18 are capable to retrieve temporal gravity signals below degree 12, while 1.0 × 10−17 clocks are useful for detecting the signals of degree 2 only. However, it poses challenges for clocks to achieve such uncertainties in a short time. In space, the CAI gradiometer is expected to have its ultimate sensitivity and a remarkable stability over a long time (measurements are precise down to very low frequencies). The three diagonal gravity gradients can properly be measured by CAI gradiometry with a same noise level of 5.0 mE/√Hz. They can potentially lead to a 2–5 times better solution of the static gravity field than that of GOCE above degree and order 50, where the GOCE solution is mainly dominated by the gradient measurements. In the lower degree part, benefits from CAI gradiometry are still visible, but there, solutions from GRACE-like missions are superior.
    Description: Deutsche Forschungsgemeinschaft
    Description: http://icgem.gfz-potsdam.de/tom_longtime
    Description: https://earth.esa.int/web/guest/-/goce-data-access-7219
    Description: ftp://podaac.jpl.nasa.gov/allData/grace/L1B/JPL/
    Keywords: ddc:526 ; Quantum optical sensors ; Optical clocks ; Relativistic geodesy ; Atomic gradiometry ; Gravity field
    Language: English
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