A new global Earth's gravity field model from satellite orbit perturbations: GRIM5-S1

Details A new global Earth's gravity field model from satellite orbit perturbations: GRIM5-S1 A new global Earth's gravity field model from satellite orbit perturbations: GRIM5-S1

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.3611b&link_type=abstract

Geophysical Research Letters, Volume 27, Issue 22, p. 3611-3614

Statistics

Computation

29

Geodesy And Gravity: Geopotential Theory And Determination, Geodesy And Gravity: Regional And Global Gravity Anomalies And Earth Structure, Geodesy And Gravity: Satellite Orbits, Geodesy And Gravity: Space Geodetic Surveys

Scientific paper

A new model of the Earth's gravity field, called GRIM5-S1, was prepared in a joint German-French effort. The solution is based on satellite orbit perturbation analysis and exploits tracking data from 21 satellites to solve simultaneously for the gravitational and ocean tide potential and tracking station positions. The satellite-only solution results in a homogeneous representation of the geoid with an approximation error of about 45 cm in terms of 5×5 degree block mean values, and performs globally better in satellite orbit restitution than any previous gravity field model. The GRIM5 normals, which were generated taking into account the latest computational standards, shall be the reference for use during the coming geopotential satellite mission CHAMP and should provide new standards in computing orbits of next altimetric missions like Jason and ENVISAT. The GRIM5-S1 normals also give the basis for the tracking/surface data combined solution GRIM5-C1.

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