【作者】 郑伟； 许厚泽； 钟敏； 员美娟； 周旭华； 彭碧波；

【Author】 Zheng Wei1,2, Xu Houze1, Zhong Min1, Yun Meijuan3, Zhou Xuhua1, Peng Bibo1 1. Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China 2. Disaster Prevention Research Institute, Kyoto University, Uji, Kyoto 611-0011, Japan 3. Department of Applied Physics, Wuhan University of Science and Technology, Wuhan 430081, China

【机构】 中国科学院测量与地球物理研究所； 武汉科技大学应用物理系；

【摘要】 本文基于国际卫星跟踪卫星高低技术,利用能量守恒法结合预处理共轭梯度迭代法恢复了70阶CHAMP地球重力场。在70阶处,恢复引力位系数的精度为7.755×10-10,恢复累计大地水准面的精度为17.273cm,恢复重力异常的精度为0.207mGal,其结果和德国GFZ公布的EIGEN-CHAMP03S地球重力场模型符合较好。以卫星位置误差1×10-1m为标准,提出了卫星速度1×10-4m/s和加速度计非保守力3×10-9m/s2精度指标的匹配关系。本文的研究为我国将来卫星重力测量计划的最优设计提供了理论基础和计算保证,同时对国际卫星重力测量的发展方向具有一定的指导意义。更多还原

【Abstract】 In this paper, the CHAMP Earth’s gravitational field complete up to degree and order 70 is recovered using the energy conservation principle based on international Satellite-to-Satellite Tracking in the High-Low mode (SST-HL). At degree 70, geopotential coefficients degree RMS error is 7.755×10-10, cumulative geoid height error is 17.273 cm, and cumulative gravity anomaly error is 0.207 mGal, which preferably accord with the Earth’s gravitational field model EIGEN-CHAMP03S provided by GFZ in Germany. Under the standard of the accuracy of position vector 1×10-1 m, the commensurate relationship of the accuracies of velocity vector and nonconservative force from accelerometer is brought forward. This work not only can provide theoretical foundation and calculational guarantee for the optimal design of future satellite gravity measurement project in China, but also has definitely guidable meaning to the developmental direction of international satellite gravity measurement.更多还原