摘要
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-s01（Chang＇E-1 Lunar Topography Model-s01） 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 100km×100km and 100km×15 km orbit phases is performed with different gravity field models.The results show a better orbit solution with 10m-level improvement can be obtained using SGM150 and the solution is more suitable for high accuracy orbit determination for lunar probes.
出处
《飞行器测控学报》
2012年第6期74-79,共6页
Journal of Spacecraft TT&C Technology
基金
国家自然科学基金(No.11173005
No.11073047
No.11203003)
关键词
嫦娥二号
月球重力场模型
精度分析
轨道确定
谱分析
Chang＇E-2
lunar gravity model
accuracy analysis
orbit determination
spectral analysis
