Statistics – Applications
Scientific paper
Jul 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987imeg.book.....m&link_type=abstract
Unknown
Statistics
Applications
2
Earth Gravitation, Geodesy, Geoids, Geopotential, Gravitational Fields, Mathematical Models, Orbit Calculation, Planetary Gravitation, Satellite Tracking, Spherical Harmonics, Earth Orientation, Earth Tides, Laser Range Finders
Scientific paper
Goddard Earth Model T1 (GEM-T1), which was developed from an analysis of direct satellite tracking observations, is the first in a new series of such models. GEM-T1 is complete to degree and order 36. It was developed using consistent reference parameters and extensive earth and ocean tidal models. It was simultaneously solved for gravitational and tidal terms, earth orientation parameters, and the orbital parameters of 580 individual satellite arcs. The solution used only satellite tracking data acquired on 17 different satellites and is predominantly based upon the precise laser data taken by third generation systems. In all, 800,000 observations were used. A major improvement in field accuracy was obtained. For marine geodetic applications, long wavelength geoidal modeling is twice as good as in earlier satellite-only GEM models. Orbit determination accuracy has also been substantially advanced over a wide range of satellites that have been tested.
Christodoulidis D. C.
Felsentreger Theodore L.
Klosko Steve M.
Lerch F. J.
Marsh James G.
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