A gravity field model based on CHAMP short_arc dynamical orbits
基于CHAMP短弧长动力学轨道的地球重力场模型

We discuss the dynamical method for recovering the gravity field model based on the dynamical orbits and accelerometer data of CHAMP and derive the mathematical algorithm to solve the accelerometer scale and bias,the satellite's initial state vector and the model coefficients simultaneously.The gravity field model TJCHAMP01S has been recovered with the 120-day CHAMP data including dynamical orbits and accelerometer data,and validated based on various criteria.The results show that the model TJCHAMP01S is more accurate than the EGM96 and EIGEN-1S model of the same degree and order.