When using the dynamic approach to recover the time‐variable gravity field, the reference orbit generated by the perturbation model and the non‐conservative force observed from the accelerometer should be introduced at first, and then the observation equations of the residual orbit and the residual range rate are established. This introduces a perturbation model error and instrument noise. Thus, there are low‐frequency errors in the residual orbit and the residual range rate. Currently, most studies only focus on the low‐frequency error of the residual range rate, neglecting the influence of the low‐frequency error in the residual orbit......
Loading....