摘要
基于动力学法反演地球重力场的基本理论,研究了卫星初始状态向量误差对应用低轨卫星精密轨道数据反演地球重力场的影响。在仅考虑低轨卫星初始状态误差的情况下进行了模拟计算,结果表明:在利用低轨卫星精密轨道数据反演地球重力场时,卫星初始状态向量误差需要重新进行估计;在目前的轨道精度水平下,若不顾及误差方程二次项的影响,反演弧长不宜过长;卫星初始状态速度误差(约1.5mm/s)的影响要大于位置误差(约10 cm)的影响。
Based on the basic theory of Earth gravity field recoverT using dynamical method, the influence of satellite initial state errors on Earth gravity field recovery with LEO satellite precise orbit data is analyzed in this paper. The numerical simulation has been done in the case of considering LEO satellite initial state errors. The results show that the statellite initial state errors have to be reestimated for Earth gravity field recovery with LEO satellite orbit. Under present accuracy of actual satellite orbit, the arc length of Earth gravity field recovery is not suitable for the long are length, regardless of the influence of quadratic term of error equation. The influence of satellite initial state velocity errors （1.5mm/s） on the gravity field recovery is greater than satellite initial state position errors （10cm） .
出处
《测绘科学》
CSCD
北大核心
2009年第3期46-48,共3页
Science of Surveying and Mapping
基金
国家自然科学基金(40474006)
地球空间环境与大地测量教育部重点实验室开放基金(06-01)
