从阶方差、谱域分析以及大地水准面自由空气重力异常3个方面分析了月球重力场模型LP150Q,LP165P与SGM150各自的特点及差异,研究结果表明,SGM150重力场在中高阶项上得到了明显改善,在远月面可以发现明显的重力异常正负交替的现象.另外,对“嫦娥二号”变轨试验期间的测轨数据进行了轨道解算和预报,比较不同重力场模型的精度影响,发现基于SGM150模型的解算结果优于基于LP150Q和LP165P的,在定轨弧段内有10m量级的精度提升,可用于高精度的月球探测器精密定轨.%The features of and differences between the gravity models of LP150Q, LP165P and SGM150 are analyzed. Cross-power spectra of gravity and topography show there is more consistency between SGM150 and CLTM-sOl (Chang'E-l Lunar Topography Model-sOl) and the lunar gravity anomaly of SGM150 can better reveal the characteristics of the moon, especially its far-side. Orbit determination for Chang'E-2 at lOOkmX 100km and 100km X 15 km orbit phases is performed with different gravity field models. The results show a better orbit solution with lOm-level improvement can be obtained using SGM150 and the solution is more suitable for high accuracy orbit determination for lunar probes.
展开▼
