确定卫星重力场中的海潮负荷影响问题

doi:10.11867/j.issn.1001-8166.2006.05.0482

地球科学进展 ›› 2006, Vol. 21 ›› Issue (5): 482 -486. doi: 10.11867/j.issn.1001-8166.2006.05.0482

确定卫星重力场中的海潮负荷影响问题

孙和平,周江存,彭碧波

中国科学院测量与地球物理研究所，湖北武汉 430077

收稿日期:2005-06-14 修回日期:2006-02-10 出版日期:2006-05-15
通讯作者: 孙和平 E-mail:heping@asch.whigg.ac.cn
基金资助:
中国科学院知识创新工程重要方向性项目“地球深内部结构和动力学研究”(编号：KZCX3-SW-131) ；院百人计划项目“重力场时间变化在地球动力学研究中的应用”；国家自然科学基金项目“利用国际超导重力仪观测资料研究地球自由振荡”(编号：40374029)资助.

Effect of Ocean Tide Loading on Satellite Gravity Determination

Sun Heping,Zhou Jiangcun,Peng Bibo

Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077,China

Received:2005-06-14 Revised:2006-02-10 Online:2006-05-15 Published:2006-05-15

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概要综述了确定卫星重力场恢复中的海洋负荷潮汐改正理论和精度估算问题。利用TPXO6海潮模型计算了海潮对卫星重力恢复的影响，与GRACE观测误差实施了对比。结果说明海潮M2波对卫星重力场恢复的影响最大，并主要体现在40阶以下的位系数上。海潮模型误差对低阶卫星重力场恢复的影响也是比较明显的。相关结果可有效降低GRACE恢复的低价重力场位系数的潮汐成分，为我国相应的学科研究提供有效参考。

关键词: 重力位系数, 卫星重力, 海潮负荷, 阶方差

The theory and error estimation of the influence of ocean tide on the determination of satellite gravity recovery are described briefly. Using the ocean tide model of TPXO6, the effect of ocean tide on gravity determination is investigated and compared with the error of recovered gravity by GRACE. The result shows that M2 constituent of ocean tide contributes most and mainly to the potential coefficients of degrees below 40 and that the error of ocean tide also notably affects the gravity determination of low degrees. This result is adopted to reduce the tidal component in recovered gravity of low degrees and provides reference in relative studies.

Key words: Satellite gravity, Degree variance., Gravity coefficients, Ocean tide loading

中图分类号:

P223/P312

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