CHAMP Gravity Field Recovery Using Kinematic Orbits
CHAMP Gravity Field Recovery Using Kinematic Orbits
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DOI：
10.1002/cjg2.656
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发表时间：
2005-03
期刊：
影响因子：
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通讯作者：
Tianhe Xu;Yuanxi Yang
中科院分区：
文献类型：
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作者：
Tianhe Xu;Yuanxi Yang
提出了一种利用能量守恒方法从CHAMP运动轨道恢复地球重力场的方法。提出了一种结合牛顿数值微分公式和移-恢复法确定运动速度的方法。利用慕尼黑工业大学（TUM）提供的CHAMP运动学轨道恢复了3个50度阶地球重力场模型。与GRIM5-C1、EIGEN-1S和EIGEN-2的度方差和大地水准面差比较表明，恢复模型与EIGEN-2的拟合效果较好。利用北极重力异常资料进行的评价表明，这些模式的质量与EIGEN-1S和EIGEN-2几乎相同，且优于GRIM5-C1。
A earth gravity field recovery from CHAMP kinematic orbits using energy conservation approach is presented. A method combining the Newton's numerical differential formula and the remove-restore procedure for determining kinematic velocities is developed. Three earth gravity field models with 50 degree and order are recovered using CHAMP kinematic orbits provided by Technical University of Munich (TUM). The comparisons of degree variance and geoid difference with GRIM5-C1, EIGEN-1S and EIGEN-2 indicate that the recovered models yield a better fit to EIGEN-2. The assessments using Arctic gravity anomalies data show that these models have nearly the same quality of EIGEN-1S and EIGEN-2, and perform better than GRIM5-C1.