Physics
Scientific paper
Jul 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29n..37r&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 14, pp. 37-1, CiteID 1692, DOI 10.1029/2002GL015064
Physics
24
Geodesy And Gravity: Geopotential Theory And Determination, Geodesy And Gravity: Satellite Orbits, Geodesy And Gravity: Space Geodetic Surveys, Geodesy And Gravity: Instruments And Techniques
Scientific paper
Using three months of GPS satellite-to-satellite tracking and accelerometer data of the CHAMP satellite mission, a new long-wavelength global gravity field model, called EIGEN-1S, has been prepared in a joint German-French effort. The solution is derived solely from analysis of satellite orbit perturbations, i.e. independent of oceanic and continental surface gravity data. EIGEN-1S results in a geoid with an approximation error of about 20 cm in terms of 5 × 5 degree block mean values, which is an improvement of more than a factor of 2 compared to pre-CHAMP satellite-only gravity field models. This impressive progress is a result of CHAMP's tailored orbit characteristics and dedicated instrumentation, providing continuous tracking and direct on-orbit measurements of non-gravitational satellite accelerations.
Balmino Georges
Barthelmes Franz
Biancale Richard
Bode Albert
König Rolf
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