基于跟踪观测技术恢复月球重力场模型的分辨率条件

Resolution Conditions of Lunar Gravity Field Determination Based on Tracking Observation Technology

月球重力场的恢复依赖于对绕球探测器的跟踪观测，可恢复重力场模型的最高阶次与观测数据分布的密集程度之间满足一定的关系。本文以极圆轨探测器为对象，研究了恢复至不同模型最高阶次沿纬线方向（星下点轨迹间距）和沿经度方向（采样间隔）的最低分辨率条件，并结合“嫦娥一号”实际情况进行了相关讨论。

The recovery of the lunar gravity field model depends on the tracking observation of lunar detectors, the highest lunar gravity model order is connected with denseness of the tracking data. In this paper, the lowest requirements on longitudinal and latitudinal resolution are derived for the recovery of the lunar gravity field model up to different degree and order for a circularpolar lunar orbiter. Then discussions are made on ＂Chang＇E＂ mission.