基于地球GNSS和导航增强星的地月空间导航方法  

An earth-moon space navigation method based on the earth GNSSand navigation augmentation satellite

作　　者：同钊 朱向鹏 陈素芳[1] 徐连军[1] 蒙艳松[1] TONG Zhao;ZHU Xiangpeng;CHEN Sufang;XU Lianjun;MENG Yansong(China Academy of Space Technology(Xi′an),Xi′an 710000,China)

机构地区：[1]中国空间技术研究院西安分院,西安710000

出　　处：《中国空间科学技术（中英文）》2024年第3期69-79,共11页Chinese Space Science and Technology

基　　金：国家自然科学基金(62101436)。

摘　　要：针对载人登月及无人月球探测后续任务中亟须突破的高精度实时自主导航需求,拥有GNSS自主导航能力具有重大意义,符合未来月球探测任务简便、低代价导航发展趋势。而将地球GNSS导航直接应用到地月空间导航场景所能提供的实时导航能力有限,无法满足高精度导航应用的需求。因此,提出了一种基于地球GNSS和导航增强星的地月空间导航方法,通过仅增加一颗月球空间导航节点,在播发导航信号的同时,分别建立与地球GNSS导航星座和月球用户之间的双向时间同步链路,将钟差与位置误差进行解耦,实现月球用户的高精度实时三维绝对导航。仿真结果表明,该方法能大幅提升月球用户的几何精度因子,可获得优于50m的实时定位精度,具有很强的实用性。It is of great significance that lunar spacecraft has the ability of GNSS autonomous navigation for the demands of high precision,low cost and autonomous navigation in the following human and unmanned lunar exploration task,which keeps up with the simple and low cost trends of the future lunar mission.However,the direct application of the earth GNSS navigation to the high precision earth-moon navigation scenario has the limited capacity of real-time navigation,which cannot meet the demand of the high precision navigation application for the future lunar exploration mission.Thus,the earth-moon space navigation method based on the GNSS and navigation augmentation satellite was developed.By adding a moon navigation node which broadcasts navigation signal,the time synchronization link was built between GNSS and moon navigation satellite,and also between lunar users and moon navigation satellite,the clock and position error were decoupled and high precision real-time three-dimensional absolute navigation was realized.At last,the precision of the proposed navigation method was simulated and the results of simulation show that the PDOP of the user was highly improved.The positioning accuracy is better than 50 m and the method has high practicability.

关 键 词：月球导航 GNSS导航 月球导航增强卫星 双向时间同步 钟差解耦 实时高精度 

分 类 号：TN967.1[电子电信—信号与信息处理]