BDS-3在轨卫星广播星历精度评估  

Accuracy evaluation of BDS-3 satellite broadcast ephemeris

作　　者：姚文豪 李方超 高文亮 王明君 YAO Wenhao;LI Fangchao;GAO Wenliang;WANG Mingjun(School of Environment Science and Spatial Informatics,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Key Laboratory of Land Environment and Disaster Monitoring,MNR,Xuzhou,Jiangsu 221116,China)

机构地区：[1]中国矿业大学环境与测绘学院,江苏徐州221116 [2]自然资源部国土环境与灾害检测重点实验室,江苏徐州221116

出　　处：《测绘科学》2022年第7期1-8,26,共9页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41874006,41974026)

摘　　要：针对BDS-3现有在轨卫星广播星历精度评估问题,以BDS-2和BDS-3 MEO和IGSO卫星为研究对象,基于武汉大学数据分析中心发布广播星历和精密星历对42颗北斗卫星的卫星轨道误差、钟差误差和空间信号测距误差进行精度评估和分析。结果表明:卫星轨道方面,径向误差明显优于切向和法向误差,BDS-3整体轨道误差在0.23 m以下。径向、切向和法向精度BDS-3卫星相比BDS-2卫星分别提高了64%、26%和5%;钟差方面,H钟差误差优于Rb钟差误差,H钟钟差对于Rb钟钟差精度提高了约13%;空间信号测距精度方面,BDS-2卫星在1 m左右,BDS-3卫星总体精度优于0.5 m,精度提高了约50%。In order to evaluate the ranging accuracy of space signals of BDS-3 existing satellites in orbit, this paper takes BDS-2 and BDS-3 MEO and IGSO satellites as research objects. Based on broadcast ephemeris and precise ephemeris released by data Analysis Center of Wuhan University, the precision evaluation and analysis of satellite orbit error, clock error and space signal ranging error of 42 Beidou satellites are carried out. The results show that the radial error is better than the along and cross errors, and the overall orbit error of BDS-3 is less than 0.23 m. The radial, along and cross accuracy of BDS-3 satellite are 64%,26% and 5% higher than that of BDS-2 satellite, respectively. In terms of clock error, H clock error is better than Rb clock error, and H clock error improves the accuracy of Rb clock error by about 13%. In terms of space signal ranging accuracy, BDS-2 satellite is about 1 m, while the overall accuracy of BDS-3 satellite is 0.5 m, Accuracy improved by about 50%.

关 键 词：BDS-3 广播轨道误差 广播钟差 空间信号测距误差 精度评估 

分 类 号：P228[天文地球—大地测量学与测量工程]