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
张宇 1段建锋 1孔静 1曹建峰 1韩意 1李翠兰 1宋辰 1陈明1
作者信息
- 1. 北京航天飞行控制中心,北京,100094
- 折叠
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.
Abstract
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 measure-ment 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 sig-nificantly 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Key words
lunar exploration/orbit determination/observation model/same beam interferometry/micro-wave radar/laser radar引用本文复制引用
基金项目
国家自然科学基金(11872034)
国家自然科学基金(41804019)
国家自然科学基金(11973015)
出版年
2024
NETL
NSTL
万方数据