The accuracy of a Goddard Topex gravity model as seen by independent resonant data

Details The accuracy of a Goddard Topex gravity model as seen by independent resonant data The accuracy of a Goddard Topex gravity model as seen by independent resonant data

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987p%26ss...35..997w&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 35, Aug. 1987, p. 997-1008.

Physics

4

Geopotential, Topex, Accuracy, Error Analysis, Orbital Resonances (Celestial Mechanics), Resonance, Satellite Orbits

Scientific paper

The accuracy of the most recent Goddard Earth Model (GEM T1), reported by Marsh (1986), is evaluated on the basis of an examination (to orders 2 and 9-13) of 240 geopotential constraints derived from mainly deep resonant orbits. The results are presented in tables and graphs and characterized in detail. It is estimated that GEM T1 improves the higher-order geopotential by about 25 percent over GEM L2 (Lerch et al., 1982). Using GEM T1, the rms radial errors for weekly tracking arcs of the planned Topex satellite would then be about 43 cm at best.

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