中文摘要：

利用GSFC／NASA提供的GEODYNII／SOLVE软件处理月球探测器LP（Lunar Prospector）扩展任务阶段最后3个月的测速和测距跟踪数据，解算月球重力场模型，比较分析全部位系数解算和部分中高阶次位系数解算2种方法，并对2种方法解算得到的模型进行阶方差分析。同时通过轨道残差、重复轨道误差以及模型大地水准面等几个方面对基于部分中高阶次位系数解算的有效性和得到的模型进行精度评估。结果表明基于部分中高阶次位系数解算的方法进行恢复月球重力场是可行的。该方法将用于“嫦娥工程”中月球重力场的解析。

英文摘要：

Making use of GEODYNII/SOLVE software from GSFC/NASA/USA, the Doppler and range tracking data among last three months during extending mission of Lunar Prospector is processed. The lunar gravity field models solved in global sense and truncated sense are compared and analyzed. And a lunar gravity field model solved in truncated degree is presented. The model is assessed through analysis about degree-wise variance, orbital residual error and model selenoid. The result shows that it＇s reliabJe in lunar gravity field recovery based on this method, and the method will be applied in lunar gravity field recovery based on tracking data of ＂Chang＇E＂ mission.