分布式导航星座自主定轨性能评估  

Performance evaluation on autonomous orbit determination of the distributed navigation constellation

作　　者：辛洁 李晓杰 王冬霞 张天桥 郭睿 李子强 XIN Jie;LI Xiaojie;WANG Dongxia;ZHANG Tianqiao;GUO Rui;LI Ziqiang(32021 Troops,Beijing 100094;Wuhan University,Wuhan 430077,China)

机构地区：[1]32021部队,北京100094 [2]武汉大学,武汉430077

出　　处：《测绘科学》2020年第7期50-55,共6页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41204022,41374038,61603397)。

摘　　要：针对星座自主导航定轨任务需求问题,该文分析了卫星自主定轨的原理,提出了一种基于分布式Kalman滤波的星座自主定轨性能评估方法,着重从星间链路有效数、星座布局、定轨精度等方面给出了评估结论。评估结果表明:合理的星间链路有效数和星座布局是实现分布式导航星座自主定轨的前提条件;仅依靠星间链路是无法提供足够的信息以区分星座中是否存在旋转,存在自主定轨星座旋转的不可观测性问题;对于全网交联且星间测距残差满足自主滤波条件的分布式导航星座,所有卫星的自主定轨精度基本相当。Aiming at the problem of the autonomous orbit determination requirements,the paper analyzed the theory of the autonomous orbit determination,proposed a performance evaluation method of autonomous orbit determination and gave the evaluation conclusion in the effective number of the inter-satellite links,the constellation arrangement and the orbit determination accuracy.The results demonstrated that the proper effective number of the inter-satellite link and constellation arrangement was the prediction of autonomous orbit determination for the distributed navigation constellation;the inter-satellite links alone did not provide enough information to distinguish between rotations in a constellation and there existed the problem of un-observation of the rotation of the autonomous orbit constellations;for the distributed constellation which was cross-linked with the whole network and whose inter-satellite residuals met the condition of the autonomous filtering,the autonomous orbit determination accuracy of all satellites was basically equal.

关 键 词：卫星导航系统 自主定轨 星间链路 

分 类 号：P228[天文地球—大地测量学与测量工程]