基于中继测量的环月探测器定轨能力分析  

A Simulation Study of Orbit Determination for Lunar Probe via Tracking and Data Relay Satellite

作　　者：曹建峰 刘磊[1,2] 刘也 苏伟钢[2] 胡松杰 

机构地区：[1]航天飞行动力学技术重点实验室,北京100094 [2]北京航天飞行控制中心,北京100094

出　　处：《飞行器测控学报》2017年第2期112-117,共6页Journal of Spacecraft TT&C Technology

基　　金：国家自然科学基金(No.61573049,No.11373013)

摘　　要：嫦娥四号月球探测拟首次实现月球背面的软着陆,测控与数传依赖地月L2平动点的中继卫星,并有望获取四程测量与星间测量数据。对基于中继测量的环月探测器测定轨能力进行了仿真分析,结果表明,中继卫星可较好地实现环月探测器连续跟踪;在定轨能力方面,中继卫星自身轨道精度是制约环月探测器定轨精度的重要因素,当跟踪弧段达到5h以上时,定轨精度趋于稳定,但轨道精度较中继卫星的轨道精度相差1个量级;对于星间链路测量,除中继卫星自身的轨道精度外,星钟的稳定性是制约定轨精度的另一个重要因素,如果辅助以每天1h的地基跟踪亦可实现优于百m的定轨精度。Chang＇E-4 will have a soft landing on the far-side of the moon for the first time.The tracking and data transmission for Chang＇ E-4will depend on a tracking and data relay satellite on a Lissajous orbit around the Earth-Moon L2 point,and four-way ranging measurement is expected to be obtained.The capability of orbit determination for Chang＇ E-4 is studied by simulation.The results show that a tracking and data relay satellite can realize a near full time tracking for the lunar probe.In terms of orbit determination capability,the orbital accuracy of tracking and data relay satellite is an important constraint.Once the tracking arc reaches 5 hours,the orbit solution for the lunar probe tends to be stable.However,orbital accuracy is still one order of magnitude lower than that of tracking and data relay satellite.For inter-satellite tracking,the stability of the satellite clock is another constraint.With one hour auxiliary ground station tracking every day,an orbital accuracy of 100 mcan be achieved.

关 键 词：中继卫星(TDRS) 环月探测器 星间链路 定轨 

分 类 号：V412.41[航空宇航科学与技术—航空宇航推进理论与工程]