嫦娥五号双目标联合定轨技术研究  

Dual-Target Joint Orbit Determination Technology of Chang’E-5

作　　者：张宇[1] 段建锋[1] 孔静[1] 曹建峰[1] 韩意 李翠兰[1] 宋辰 陈明[1] ZHANG Yu;DUAN Jianfeng;KONG Jing;CAO Jianfeng;HAN Yi;LI Cuilan;SONG Chen;CHEN Ming(Beijing Aerospace Flight Control Center,Beijing100094,China)

机构地区：[1]北京航天飞行控制中心,北京100094

出　　处：《武汉大学学报（信息科学版）》2024年第6期952-959,共8页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金(11872034,41804019,11973015)。

摘　　要：为提升轨道器与上升器在月球交会对接过程中的相对轨道精度,以嫦娥五号双目标联合测量为基础,建立了同波束测量(same beam interferometry, SBI)和星间测量的模型,设计了轨道器与上升器联合的统计定轨算法。利用基准轨道分析了SBI时延、时延率和微波雷达/激光雷达的测距、测速数据精度,结果表明,嫦娥五号SBI与甚长基线干涉测量精度相当,微波雷达/激光雷达的测距精度为米级。在定轨中建立两目标相对运动关系,能够明显提升相对轨道精度。Objectives The accuracy of relative track between orbiter and ascender can ensure success and safety during the meeting and docking process of Lunar.Methods Based on dual-target joint measurement of Chang’E-5,we established the same beam interferomery(SBI)measurement and inter-satellite measurement model,and designed a statistical orbit determination algorithm combined with orbiter and ascender.Results We used the reference orbit to analyze delay and delay rate of SBI,and the range and range accuracy of microwave radar/laser radar.The accuracy of SBI is equivalent to that of very long baseline interferometry,and the range accuracy of microwave radar/laser radar is at meter level.Conclusions By establishing the relative motion relationship between the two targets,the relative orbit accuracy can be significantly improved in orbit determination.

关 键 词：月球探测 定轨 观测建模 同波束测量 微波雷达 激光雷达 

分 类 号：P228[天文地球—大地测量学与测量工程]