基于实测星间距离的BDS-3卫星集中式自主定轨性能初步分析  

Preliminary Performance Analysis of BDS-3 Centralized Autonomous Orbit Determination Based on Inter-Satellite Ranging Observations

作　　者：李子强 程军龙 刘万科[1] 王甫红[1] LI Ziqiang;CHENG Junlong;LIU Wanke;WANG Fuhong(School of Geodesy and Geomatics,Wuhan University,129 Luoyu Road,Wuhan 430079,China)

机构地区：[1]武汉大学测绘学院,武汉市430079

出　　处：《大地测量与地球动力学》2020年第12期1283-1289,共7页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(91638203)。

摘　　要：简要给出基于星间双向测距的BDS-3导航卫星自主定轨模型,然后基于BDS-3基本系统的18颗MEO的星间链路测距数据开展自主定轨处理及性能分析。结果表明,BDS-3星间链路测距功能运行稳定、连续性较好,单星可用链路数目约为8.5条,星间建链几何构型PDOP值约为1.34;连续30 d的集中式自主定轨处理正常稳定,与事后精密产品比较得出,所有卫星的轨道URE的平均RMS为0.47 m,相对时间同步误差的平均RMS为0.31 ns。First,this paper briefly gives the AOD processing model based on inter-satellite ranging observations.Then,based on the real inter-satellite ranging data of the 18 MEOs of the BDS-3 basic system,the paper performs an autonomous orbit determination processing and performance analysis.The analysis results demonstrate that BDS-3’s ISL ranging function operates stably and has good continuity,the available ISL number of a single satellite is about 8.5,and the PDOP is about 1.34,the centralized autonomous orbit determination processing for 30 consecutive days is normal and stable,the average RMS of the orbital URE of all 18 satellites is 0.47 m,and the average RMS of the constellation relative time synchronization error is 0.31 ns when compared with precision orbit and clock products.

关 键 词：北斗三号系统 星间测距 自主定轨 性能分析 

分 类 号：P228[天文地球—大地测量学与测量工程]