中文摘要：

本文基于星间加速度法（IRAM），利用预处理共轭梯度迭代法（PCCG）开展了地球重力场恢复的模拟研究．第一，通过9点Newton—Gregory插值法得到星间加速度，并联合星间距离、星间速度和星间加速度建立了卫星观测方程．第二，在120阶处，恢复GRAcE—IRAM累计大地水准面的精度为7．215cm．第三，分析了在地球重力场长波部分，GRACEIRAM模型的精度略低于EIGEN—GRACE02S，而在重力场中长波部分，其精度略优于EIGENGRACE02S的原因．第四，基于敏感于中高频重力场信号的优点，星间加速度法有望成为精确建立下一代高阶次地球重力场模型（如GRACE FollowOn）的有效方法．

英文摘要：

The simulation researches of Earth＇s gravitational field recovery are carried out using the Intersatellite Range-Acceleration Method （IRAM） based on the Pre Conditioned Conjugate Gradient （PCCG） approach. Firstly, the intersatellite range-accelerations are calculated by the nine-point Newton-Gregory＇s interpolation formula, and satellite observation equation is established based on the combination of intersatellite range, range rate and range- acceleration. Secondly, at degree 120, GRACE-IRAM cumulative geoid height error is 7. 215 cm, Thirdly, the reasons why the accuracy of GRACE IRAM model is slightly lower than that of EIGEN GRACE02S in the long- wavelength Earth＇s gravitational field, and is appreciably superior to that of EIGEN-GRACE02S in the medium-long wavelength Earth＇s gravitational field are analyzed. Finally, the IRAM hopefully becomes one of effective approaches for accurately establishing the next-generation high-degree Earth＇s gravitational field model （e. g. GRACE Follow On） based on the advantages of high accurately determining the medium-high frequency signals of the Earth＇ s gravitational field.