Global Gravity Field Recovery Using Solely GPS Tracking and Accelerometer Data from Champ |
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Authors: | Reigber C Balmino G Schwintzer P Biancale R Bode A Lemoine J-M König R Loyer S Neumayer H Marty J-C Barthelmes F Perosanz F Zhu S Y |
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Institution: | (1) Dept. 1 ‘Geodesy and Remote Sensing’, GeoForschungsZentrum Potsdam (GFZ), Potsdam, Germany;(2) Groupe de Recherche de Géodésie Spatiale (GRGS), Toulouse, France |
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Abstract: | A new long-wavelength global gravity field model, called EIGEN-1, has been derived in a joint German-French effort from orbit
perturbations of the CHAMP satellite, exploiting CHAMP-GPS satellite-to-satellite tracking and on-board accelerometer data
over a three months time span. For the first time it becomes possible to recover the gravity field from one satellite only.
Thanks to CHAMP'S tailored orbit characteristics and dedicated instrumentation, providing continuous tracking and on-orbit
measurements of non-gravitational satellite accelerations, the three months CHAMP-only solution provides the geoid and gravity
with an accuracy of 20 cm and 1 mgal, respectively, at a half wavelength resolution of 550 km, which is already an improvement
by a factor of two compared to any pre-CHAMP satellite-only gravity field model.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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