YE Mao, LI Fei, YAN Jianguo, HAO Weifeng, SHAO Xianyuan. Orbit Determination Ability Analysis of the GRAIL Gravity Model[J]. Geomatics and Information Science of Wuhan University, 2016, 41(1): 93-99. DOI: 10.13203/j.whugis20150008
Citation: YE Mao, LI Fei, YAN Jianguo, HAO Weifeng, SHAO Xianyuan. Orbit Determination Ability Analysis of the GRAIL Gravity Model[J]. Geomatics and Information Science of Wuhan University, 2016, 41(1): 93-99. DOI: 10.13203/j.whugis20150008

Orbit Determination Ability Analysis of the GRAIL Gravity Model

  • The new GRAIL gravity model GRGM660PRIM has advanced in the aspect of resolution and degree when compared with historical lunar gravity field models. In this paper, we present a quantitative analysis of the orbit determination ability of the GRGM660PRIM in orbit prediction and precise orbit determination (POD). In a comparison with the LP50Q and SGM150j models, results show that the GRGM660PRIM is close to the level of the LP150Q and SGM150 in satellite lifetime prediction; in the Apollo 16 subsatellite POD, GRGM660PRIM shows its advantages at high degrees and precision, the residuals RMS of two Doppler decreases from 1.36~1.48 mm/s to 0.722 mm/s, and the three way Doppler residuals RMS decrease from 1.67~1.69 mm/s to 1.2 mm/s;the precision of orbit determination improves significantly. These conclusions can provide a reference for the upcoming Chinese Chang'E-5 mission and further lunar missions.
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