AIUB-CHAMP02S: The influence of GNSS model changes on gravity field recovery using spaceborne GPS |
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| Authors: | L Prange A Jäggi R Dach H Bock G Beutler L Mervart |
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| Institution: | 1. Astronomical Institute, University of Bern (AIUB), Sidlerstrasse 5, 3012 Bern, Switzerland;2. Institute of Advanced Geodesy, Czech Technical University, Thakurova 7, 16629 Prague, Czech Republic |
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| Abstract: | The gravity field model AIUB-CHAMP02S, which is based on six years of CHAMP GPS data, is presented here. The gravity field parameters were derived using a two step procedure: In a first step a kinematic trajectory of a low Earth orbiting (LEO) satellite is computed using the GPS data from the on-board receiver. In this step the orbits and clock corrections of the GPS satellites as well as the Earth rotation parameters (ERPs) are introduced as known. In the second step this kinematic orbit is represented by a gravitational force model and orbit parameters. |
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| Keywords: | Gravity field GPS CHAMP Antenna phase center variations (PCV) |
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