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  • Other Sources  (24)
  • EARTH RESOURCES AND REMOTE SENSING  (13)
  • Seismology  (5)
  • Astrophysics  (3)
  • Propellants and Fuels
  • 2000-2004  (10)
  • 1980-1984  (14)
  • 1
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    A re-assessment of focal depth distributions in southern Iran, the Tien Shan and northern India: do earthquakes really occur in the continental mantle? (2000)
    In:  Geophys. J. Int., San Francisco, Pergamon, vol. 143, no. 3, pp. 629-661, pp. L15303, (ISSN: 1340-4202)
    Details
    Publication Date: 2000
    Keywords: Hypocentral depth ; CRUST ; earth mantle ; Seismology ; Rheology ; Lithosphere ; GJI
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Backazimuth estimation reliability using surface wave polarization (2004)
    In:  Geophys. Res. Lett., Washington D.C., Bundesanstalt für Geowissenschaften und Rohstoffe, vol. 31, no. 9, pp. 1-4, pp. L09611
    Details
    Publication Date: 2004
    Description: Backazimuth estimates derived from surface wave polarization can be used to test association of an observed surface wave with a seismic event. However, commonly used techniques for estimating the backazimuth are subject to a number of errors and are often inaccurate. We evaluate the performance of a new algorithm for determining Rayleigh wave propagation direction from the cross-correlation of the horizontal and Hilbert transformed vertical seismograms. This proves to be more accurate and much less error-prone than current automatic processing procedures, and the cross-correlation value provides a good measure of the reliability of the backazimuth estimate. Consequently, the new algorithm will permit more reliable event association at a lower magnitude threshold.
    Keywords: Horizontal to vertical spectral ratio ; Nakamura ; Spectrum ; NOISE ; Site amplification ; Surface waves ; Polarization ; Rayleigh waves ; Correlation ; Hilbert transform ; 7200 ; Seismology ; 7219 ; Seismology: ; Nuclear ; explosion ; seismology ; 7255 ; Surface ; waves ; and ; free ; oscillations ; GRL
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    The Anza array: a high-dynamic-range, broadband, digitally radiotelemetered seismic array (1984)
    In:  Bull. Seism. Soc. Am., San Francisco, Pergamon, vol. 74, no. 6, pp. 1469-1481, pp. 1246
    Details
    Publication Date: 1984
    Keywords: Seismic networks ; Seismic arrays ; Detectors ; sta ; Broad-band ; Tele-communication ; Seismology ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 4
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    Grouted sediment slices show signs of earthquake shaking (2001)
    In:  Eos Trans. AGU, Minsk, Elsevier Scientific Publishing Company, vol. 82, no. 49, pp. 603, pp. B12308
    Details
    Publication Date: 2001
    Keywords: paleo ; Seismology ; Geol. aspects ; 7221 ; Seismology ; Paleoseismology ; 1829 ; Hydrology ; Groundwater ; hydrology ; 7294 ; Instruments ; and ; techniques
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    BIBLIOGRAPHY SEISMOLOGY
  • 5
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    Source-dependent frequency content of ultrashallow seismic reflection data (2000)
    In:  Bull. Seism. Soc. Am., Washington D.C., Bundesanstalt für Geowissenschaften und Rohstoffe, vol. 90, no. 2, pp. 494-499, pp. L09611
    Details
    Publication Date: 2000
    Keywords: Seismology ; Seismics (controlled source seismology) ; Spectrum ; Source ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 6
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    Some characteristics and advantages of LANDSAT 3 return beam vidicon images (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: One advantage of a LANDSAT 3 return beam vidicon (RBV) scene is the synoptic view it provides. A 1:500,000 paper print of the size 19.4 cm x 19.4 cm encompasses an area of about 3,721 square miles (9,637 sq. km.) and this compares very favorably in coverage to small scale aerial photography. A second important advantage is that the ground resolution is 38 by 38 meters. Compared to the resolution of the MSS which is 79 by 79 meters the RBV provides a wealth of detail useful for many purposes. A great variety of man made structures are visible including bridges, roads, docks, and small airfields. Agricultural field patterns are clear and settlements of various sizes can be identified and delineated. A third advantage is related to the approximate panchromatic spectral response displayed in RBV images. Since many aerial photographic interpreters are accustomed to working with panchromatic photographs, they should have no difficulty understanding and putting RBV images immediately into use.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Purdue Univ. CORSE-81: The 1981 Conf. on Remote Sensing Educ.; p 84-85
    Format: text
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  • 7
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    Relationships between mineralization and silicic volcanism in the Central Andes (1983)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Journal of Volcanology and Geothermal Research (ISSN 0377-0273); 18; 165-190
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    NASA TECHNICAL REPORTS
  • 8
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    Standards Development Activities at White Sands Test Facility (2003)
    In:  CASI
    Details
    Publication Date: 2018-06-12
    Description: The development of standards and standard activities at the JSC White Sands Test Facility (WSTF) has been expanded to include the transfer of technology and standards to voluntary consensus organizations in five technical areas of importance to NASA. This effort is in direct response to the National Technology Transfer Act designed to accelerate transfer of technology to industry and promote government-industry partnerships. Technology transfer is especially important for WSTF, whose longterm mission has been to develop and provide vital propellant safety and hazards information to aerospace designers, operations personnel, and safety personnel. Meeting this mission is being accomplished through the preparation of consensus guidelines and standards, propellant hazards analysis protocols, and safety courses for the propellant use of hydrogen, oxygen, and hypergols, as well as the design and inspection of spacecraft pressure vessels and the use of pyrovalves in spacecraft propulsion systems. The overall WSTF technology transfer program is described and the current status of technology transfer activities are summarized.
    Keywords: Propellants and Fuels
    Type: 5th Conference on Aerospace Materials, Processes, and Environmental Technology; NASA/CP-2003-212931
    Format: application/pdf
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  • 9
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    The Use of Thematic Mapper Data for Land Cover Discrimination: Preliminary Results from the UK Satmap Programme (1984)
    In:  CASI
    Details
    Publication Date: 2014-09-13
    Description: In assessing the accuracy of classification techniques for Thematic Mapper data the consistency of the detector-to-detector response is critical. Preliminary studies were undertaken, therefore, to assess the significance of this factor for the TM. The overall structure of the band relationships can be examined by principal component analysis. In order to examine the utility of the Thematic Mapper data more carefully, six different land cover classes approximately Anderson level 1 were selected. These included an area of water from the sediment-laden Mississippi, woodland, agricultural land and urban land. A plume class was also selected which includes the plume of smoke emanating from the power station and drifting over the Mississippi river.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA. Goddard Space Flight Center LANDSAT-4 Sci. Invest. Summ., Including Dec. 1983 Workshop Results, Vol. 2; p 149-152
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Autonomous Sciencecraft Experiment (ASE) Test Operations in 2003 (2003)
    In:  CASI
    Details
    Publication Date: 2017-10-02
    Description: NASA has identified the development of an autonomously operating spacecraft as a necessity for an expanded program of missions exploring the Solar System. The Autonomous Sciencecraft Experiment (ASE) has been selected for flight demonstration by NASA s New Millennium Program (NMP) as part of the Space Technology 6 (ST6) mission. ASE is scheduled to fly on the US Air Force Research Laboratory (AFRL) Techsat-21 constellation in 2006. Tech- Sat-21 consists of three satellites flying in a variable-geometry formation in Earth orbit. Each satellite is equipped with X-band Synthetic Aperture Radar, yielding high spatial resolution images (approx. 3 m) of the Earth s surface. The constellation will fly at an altitude of 550 km, in a 35.4 inclination circular orbit, yielding exact repeat-track observations every 13 days. Prior to full deployment, elements of the versatile ASE spacecraft command and control software, image formation software and science processing software will be utilized and tested on two very different platforms in 2003: AirSAR and EO-1 (described below). Advantages of Autonomous Operations: ASE will demonstrate advanced autonomous science data acquisition, processing, and product downlink prioritization, as well as autonomous spacecraft command and control, and fault detection. The advantages of spacecraft autonomy are to future missions include: (a) making the best use of reduced downlink; (b) the overcoming of communication delays through decisionmaking in situ, enabling fast reaction to dynamic events; (c) an increase of science content per byte of returned data; and (d) an avoidance of return of null (no-change/no feature) datasets: if there is no change detectable between two scenes of the same target, there is no need to return the second dataset.
    Keywords: Astrophysics
    Type: Lunar and Planetary Science XXXIV; LPI-Contrib-1156
    Format: text
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