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《Chinese Journal of Geophysics》 2006-01
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The rotation of the gravity potential on the Earth's gravity field recovery

CHENG Lu-Ying~(1,2), XSU Hou-Ze~11 Institute of Geodesy and Geophysics,Chinese Academy of Sciences, Wuhan 430077, China2 Xi'an Research Institute of Surveying and Mapping, Xi'an 710054, China  
We analyze the effect of approximate velocity in the formula of the rotation of the gravity potential, which is caused by the Earth rotation. We compute the difference between the satellite ephemeris's velocity and numerical integral's velocity. The ephemeris data come from GFZ's Rapid Science Orbit, TUM's Reduced-Dynamic Orbit, and GFZ's Post-processed Science Orbit respectively. The integral data are obtained based on the reference gravity field models EGM96, EIGEN2, and EIGEN-CG01C, respectively. The fitting between ephemeris velocity and integral velocity depended on EIGEN2 reference gravity field model is better than the EGM96 and EIGEN-CG01C model. The variations of velocity difference have obvious periodicity, which coincides with the satellite orbit period. When the disturbing potential of 1m~2/s~2 accuracy, or the approximate velocity of accuracy less 2mm/s in the formula of the rotation of the gravity potential is required, the satellite orbit data not satisfied the potential rotation computing demand are rejected from the GFZ's Rapid Science Orbit and TUM's Reduced-Dynamic Orbit. If the disturbing potential is desired 0.5m~2/s~2 at satellite track, the satellite velocity required in formula of the rotation of the gravity potential should be re-computed or the GFZ's Post-processed Science Orbit is adopted.
【Fund】: 国家自然科学基金项目(40234039)资助.
【CateGory Index】: P312.1
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【Co-citations】
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1 ZHONG-Bo①,LUO Zhi-cai①②,WU Yun-long①,LUO-Jia①②(①School of Geodesy and Geomatics,Wuhan University;②The Key Laboratory of Geospace Environment and Geodesy,Ministry of Education,Wuhan University,Wuhan 430079,China);Design and realization of the simulation analysis software for the major technology indexes of satellite-to-satellite tracking mission[J];Science of Surveying and Mapping;2008-03
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