Other
Scientific paper
Dec 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978p%26ss...26.1081w&link_type=abstract
Planetary and Space Science, vol. 26, Dec. 1978, p. 1081-1140.
Other
5
Celestial Geodesy, Environment Models, Error Analysis, Geopotential, Gravimetry, Satellite Tracking, Accuracy, Altimeters, Calibrating, Geoids, Gravity Anomalies, Harmonic Analysis, Ocean Surface, Orbital Elements, Orbital Resonances (Celestial Mechanics), Satellite Orbits, Satellite-Borne Instruments
Scientific paper
The accuracy of two recent geopotential models, GEM 7 and GEM 8, is evaluated and is found to be about 4.3 m with respect to the global geoid surface for GEM 7 and 3.9 m for GEM 8. The accuracies are root mean square values obtained by the use of 400 coefficients for GEM 7 and 706 coefficients for GEM 8. Independent observations used in the evaluation include 159 lumped coefficients from 35 resonant orbits, two sets of fields derived from optical-only and laser-only data, sets of zonal and resonant coefficients, and geoid undulations. The ratio of estimated commission to formal error in GEM 7 and GEM 8 ranges from 2 to 5. Several other recent geopotential models are examined.
Lerch F. J.
Wagner Carl A.
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