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  • EARTH RESOURCES AND REMOTE SENSING  (2)
  • ASTROPHYSICS  (1)
  • FACILITIES, RESEARCH, AND SUPPORT  (1)
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Keywords
  • EARTH RESOURCES AND REMOTE SENSING  (2)
  • ASTROPHYSICS  (1)
  • FACILITIES, RESEARCH, AND SUPPORT  (1)
  • GEOPHYSICS  (5)
Years
  • 1
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    Project Polaris: A Report (1980)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The project was proposed to meet the developing demands for higher resolution and accuracy polar motion and Earth rotation data to support modern geodynamic studies. The basis for the selection of radio interferometry, rather than lunar or artifical satellite laser ranging or Doppler satellite tracking, is described.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA. Goddard Space Flight Center Radio Interferometry; p 455-460
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    NOS/NGS activities to support development of radio interferometric surveying techniques (1980)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: National Geodetic Survey activities towards the development of operational geodetic survey systems based on radio interferometry are reviewed. Information about the field procedures, data reduction and analysis, and the results obtained to date is presented.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA. Goddard Space Flight Center Radio Interferometry; p 9-22
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    New test of the equivalence principle from lunar laser ranging (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: An analysis of six years of lunar-laser-ranging data gives a zero amplitude for the Nordtvedt term in the earth-moon distance yielding the Nordtvedt parameter eta = 0.00 plus or minus 0.03. Thus, earth's gravitational self-energy contributes equally, plus or minus 3%, to its inertial mass and passive gravitational mass. At the 70% confidence level this result is only consistent with the Brans-Dicke theory for omega greater than 29. We obtain the absolute value of beta - 1 less than about 0.02 to 0.05 for five-parameter parametrized post-Newtonian theories of gravitation with energy-momentum conservation.
    Keywords: ASTROPHYSICS
    Type: Physical Review Letters; 36; Mar. 15
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    University of Hawaii Lure Observatory (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The University of Hawaii's Institute for Astronomy is currently constructing a lunar laser ranging observatory at the 3050-meter summit of Mt. Haleakala, Hawaii. The Nd YAG laser system to be employed provides three pulses per second, each pulse being approximately 200 picoseconds in duration. The energy contained in one pulse at 5320 A lies in the range from 250 to 350 millijoules. Details of observatory construction are provided together with transmitter design data and information concerning the lunastat, the feed telescope, the relative pointing system, the receiver, and the event timer system.
    Keywords: FACILITIES, RESEARCH, AND SUPPORT
    Type: Symposium on Earth''s Gravitational Field and Secular Variations in Position; Nov 26, 1973 - Nov 30, 1973; Sydney; Australia
    Format: text
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    NASA TECHNICAL REPORTS
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