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  • 1
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    Global Geodesy Using GPS Without Fiducial Sites (1994)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Global Positioning System, GPS, used to make global geodetic measurements without use of fiducial site coordinates. Baseline lengths and geocentric radii for each site determined without having to fix any site coordinates. Given n globally distributed sites, n baseline lengths and n geocentric radii form polyhedron with each site at vertex and with geocenter at intersection of all radii. Geodetic information derived from structure of polyhedron and its change with time. Approach applied to any global geodetic technique.
    Keywords: PHYSICAL SCIENCES
    Type: NPO-18783 , NASA Tech Briefs (ISSN 0145-319X); 18; 10; P. 73
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Locating The Geocenter From GPS Measurements (1994)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Report presents analysis of Global Positioning System (GPS) measurements taken during 3-week geodetic experiment in early 1991. Involved constellation of 15 GPS satellites operational at that time, plus 21 GPS receiving stations at widely distributed sites, all but 4 of which in Northern Hemisphere. Analysis consisted principally of estimation of location of center of mass of Earth relative to GPS receiving stations. As part of analysis, GPS estimates of geocenter compared with estimates obtained by satellite laser ranging (SLR).
    Keywords: PHYSICAL SCIENCES
    Type: NPO-18883 , NASA Tech Briefs (ISSN 0145-319X); 18; 2; P. 96
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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