摘要
针对月球背面载人航天器的高精度、高时效性导航需求,解决仅用单颗地月L2中继星多源转发为月背面用户导航着陆提供技术支撑的问题。以地月L2点Halo轨道中继星为桥梁,将地球空间的深空网、GNSS星座等时空基准节点转发给月球背面用户,研究通过转发前后向距离和夹角的测量实现月球遮挡距离再生,利用再生距离和多个地月空间时空节点解析地给出月背面用户位置。采用STK对月背面导航场景进行仿真建模,通过蒙特卡罗方法数值分析月背面导航定位精度。结果表明:当月球遮挡距离重构误差小于0.6 ns时,采用本文方法月背面用户的三维定位精度优于100 m。
High precision and high time efficiency navigation is required for the manned spacecraft on the far side of the moon.The purpose of this study was to solve the lunar far side radiometric navigation problem with only one earth-moon L2 Halo orbiting relay satellite under a new navigation architecture.The space-time standard nodes of deep space networks and GNSS constellations in geospace were forwarded to the users in the lunar radio shadow by a lunar relay satellite.Through theoretical analysis and derivation,the blocked ranges from the transmitters in geospace to a lunar far side user were regenerated by measuring the uplink ranges,downlink ranges,and the angles between the uplink signals and the downlink signals.The position of lunar far side user was estimated analytically with the regenerated blocked ranges and the space-time standard nodes in cislunar space.STK(Satellite Tool Kit)was used to simulate and model the navigation scenes and the navigation and positioning accuracy of the far side of the moon was analyzed numerically using the Monte Carlo method.When the reconstruction error of the moon blocked range was less than 0.6 ns,the 3D positioning accuracy of the users on the far side of the moon was better than 100 m.
作者
雷文英
蒙艳松
雷文华
边朗
严涛
LEI Wenying;MENG Yansong;LEI Wenhua;BIAN Lang;YAN Tao(China Academy of Space Technology(Xi’an),Xi’an 710100,China;School of Sciences,Tibet University,Lhasa 850000,China)
出处
《载人航天》
CSCD
北大核心
2020年第1期82-87,共6页
Manned Spaceflight
基金
国家自然科学基金(61627817)
关键词
月背面
三维自主导航
弯管导航
地月L2中继星
再生测距
lunar far side
3D autonomous navigation
bend pipe navigation
Earth-Moon L2
relay satellite
