利用嫦娥一号卫星影像评估探测器轨道精度

Orbit Accuracy Evaluation Based on CE-1 Satellite Images

在航天工程中,精密轨道数据对科学研究有着重要的意义。创新性提出利用嫦娥一号影像数据来评价精密定轨中嫦娥一号轨道的精度。首先,利用地面观测数据,基于月球探测器精密定轨与重力场解算系统联合GEODYN Ⅱ计算出相应轨道数据;然后,经过影像匹配,利用前方交会原理计算月面点坐标;最后,通过分析同名月面点坐标差异来初步评价定轨精度。

This paper proposes an innovative means of using CE-1（Chang＇e 1）image data to evaluate the CE-1 orbit precision in precise orbit determination and makes full use of CE-1＇s image data,which was only originally used for lunar mapping.Firstly,based on lunar gravity recovery and analysis system and GEODYN Ⅱ,earth station observational data is applied to calculate the corresponding orbit track data.Secondly,image matching and forward intersection are used to calculate the point of the lunar face.Finally,we analyze the same point coordinate discrepancy to evaluate the orbit determination accuracy.