Accuracy Analysis of Geopotential Coefficients Recovered from In-situ Disturbing Potential by Energy Conservation Method

在恢复地球严肃模特儿(EGM ) 由创造的标准方程的特征最少平方(LS ) 从在原处扰乱的潜力的调整详细被讨论。标准方程仅仅看情况，这能被结束先验的重力模型的在轨道，和选择没在 LS 答案上有效果。因此，恢复严肃模型的精确性能精确地被模仿。从这个点开始，与噪音的不同水平沿着轨道扰乱潜力的四个集合被模仿并且被用来恢复 EGM。结果证明在加速表刻度的当前的精确性水平上， EGM 的精确性不是足够的反映地球的重力场的时间可变性，作为揭示的动态方法。

The characteristics of the normal equation created in recovering the Earth gravity model （EGM） by least-squares （LS） adjustment from the in-situ disturbing potential is discussed in detail. It can be concluded that the normal equation only depends on the orbit, and the choice of a priori gravity model has no effect on the LS solution. Therefore, the accuracy of the recovered gravity model can be accurately simulated. Starting from this point, four sets of disturbing potential along the orbit with different level of noise were simulated and were used to recover the EGM. The results show that on the current accuracy level of the accelerometer calibration, the accuracy of the EGM is not sufficient to reflect the time variability of the Earth＇s gravity field, as the dynamic method revealed.