中文摘要：

通过现有的最新月球重力场模型LP165P和GLGM-2模型对月球重力场的特征进行了分析，计算了相应重力场的阶方差，给出了两种模型在月球外部空间不同高度上的重力异常分布图，分析比较了截断至不同阶次的月球重力场模型在不同高度上所反映的月球重力场的特征和差异．此外，利用GSFC／NASA／USA的GEODYNⅡ轨道分析软件模拟计算了不同高度处卫星的轨道变化，得出了在进行一定高度的轨道计算时，可以对重力场模型进行适当截断的结论．

英文摘要：

With the new lunar gravity models LP165P and GLGM-2, we analyze the character of the lunar gravity field, compute corresponding degree-wise rms, and give gravity anomaly distribution figures at different height of the two models. Then we analyze and compare the character and difference of the lunar gravity models truncating to different orders and degrees at different height. In addition, different lunar satellite orbit revolutionary at different height are modeled by GEODYN Ⅱ from GSFC/NASA/USA. The result shows that in computing orbit at particular height, the lunar gravity model can be truncated appropriately.