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利用3种不同的月球重力场模型(LP165P、SGM150J和GL0900D),基于嫦娥三号实测超长基线干涉法(VLBI)数据分别进行嫦娥三号环月段定轨计算,通过轨道重叠分析评估了3种模型对不同环月轨道(100 km×100 km和100 km×15 km)的解算精度,分析不同阶次的重力场模型对轨道的影响,然后通过轨道预报分析3种模型的轨道预报能力,结果表明,GL0900D用于定轨及预报的精度优于其他两种模型。利用GL0900D重力场模型分别对嫦娥二号和三号的环月轨道进行确定和比较,结果表明,嫦娥三号的定轨精度明显优于嫦娥二号的定轨精度。
Using three different lunar gravitational field models (LP165P, SGM150J and GL0900D), the orbiting calculation of Chang’e III lunar and lunar phases was carried out based on the Changbai III measured long baseline interferometry (VLBI) data. Three models were evaluated by orbital overlap analysis The effects of different gravitational field models on the orbit of different lunar orbit (100 km × 100 km and 100 km × 15 km) are analyzed, and then the orbital prediction ability of the three models is analyzed by orbit prediction. The results It shows that the accuracy of GL0900D for orbit determination and prediction is superior to the other two models. The GL0900D gravity field model is used to determine and compare the lunar orbit of Chang’e II and III respectively. The results show that the orbiting accuracy of Chang’e III is obviously better than that of Chang’e II.