中文摘要：

讨论了基于GRACE卫星星历数据反演地球重力场模型的动力学法，给出了综合考虑估计加速度计尺度、偏差和卫星初始位置的算法。利用26天GRACE卫星精密轨道数据和加速度计数据解算出直到36阶次的地球重力场模型GRACE01S—OR。采用不同模型位系数差的阶方差和不同模型所表示的大地水准面的差值的方法对该模型进行了外部检核。结果表明：该模型的精度优于相同阶次的EGM96模型和EIGEN2模型，而与同阶次的CHAMP03S和CG01C模型的精度非常接近。

英文摘要：

The dynamic method for recovering gravity field model based on GRACE ephemerides is discussed, and the algorithm is put forward according to accelerometer scale and bias, the influences of initial state vector errors. The gravity field model GRACE01S_OR up to degree and order 36 are recovered from 26-day GRACE data,including dynamical orbits and accelerometer data. The degree variances and geoid differences from differ- ent models are adopted for validating the accuracy of GRACE01S_OR model. The results show that the model GRACE01S_OR is more accurate than EGM96 and EIGEN2 model truncated to the same degree and order,and has almost the same accuracy as CHAMP03S and CG01C model.