北斗三号PPP-B2b服务性能评估  

Performance Evaluation of BDS-3 PPP-B2b Service

作　　者：宋伟伟[1] 赵新科 楼益栋[1] 孙唯彬 赵正予[2] SONG Weiwei;ZHAO Xinke;LOU Yidong;SUN Weibin;ZHAO Zhengyu(GNSS Research Center,Wuhan University,Wuhan 430079,China;Electronic Information School,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学卫星导航定位技术研究中心,湖北武汉430079 [2]武汉大学电子信息学院,湖北武汉430072

出　　处：《武汉大学学报（信息科学版）》2023年第3期408-415,共8页Geomatics and Information Science of Wuhan University

基　　金：中央高校基本科研专项(2042019kf0222);北斗重大专项(GFZX030302030202);国家重点研发计划(2017YFB0503401-01);教育部联合基金(6141A02011907)。

摘　　要：北斗三号卫星导航系统(BeiDou-3 navigation satellite system,BDS-3)精密单点定位(precise point positioning,PPP)-B2b信号为中国及周边地区提供实时PPP(real-time PPP,RTPPP)服务,为了推广PPP-B2b信号的应用,需要对其服务性能进行评估。根据全球连续监测评估系统(international GNSS monitoring and assessment system, iGMAS)在中国的测站2020年9月的观测数据,评估了基于PPP-B2b信号的北斗卫星导航系统的轨道和钟差精度;分析了使用BDS-3PPP-B2b产品的B1I+B3I、B1c+B2a信号组合的定位精度以及北(north,N)方向、东(east,E)方向、天(up,U)方向收敛情况。结果显示:BDS轨道产品径向精度均值为0.1 m,切向精度均值为0.31 m,法向精度均值为0.3 m;钟差精度均方根的均值为2.26 ns,标准差的均值为0.08 ns。关于PPP收敛时间情况,在N、E、U 3个方向上,使用德国地学中心多系统快速产品(GFZ BeiDou multi-GNSS,GBM)的B1I+B3I信号组合收敛最快,且最终收敛精度最高,其次是B1I+B3I(PPPB2b)信号组合,最后是B1c+B2a(PPP-B2b)信号组合。结果表明,BDS-3 PPP-B2b信号满足中国区域PPP服务的要求。Objectives: With the ability of providing real-time precise point positioning(RTPPP) service for China and surrounding countries, the application of BeiDou-3 navigation satellite system(BDS-3) precise point positioning(PPP)-B2b signals have seen a rapid rise in recent years. And the performance evaluation is a vital issue for large deployment in the future, such as the evaluation about the accuracy of orbit and clock error, as well as the analysis of precision and and convergence time for PPP.Methods: Based on the observations from September 2020 of the China branch stations of international GNSS monitoring and assessment system(iGMAS), the accuracy of orbit and clock error, as well as the positioning accuracy of B1I+B3I and B1c+B2a signal combination are carefully evaluated in this dissertation.Results: The results show that the average accuracy of PPP-B2b orbit products in radial, along-track and cross-track directions are 0.1 m,0.31 m and 0.3 m,respectively.Besides, the root mean square of clock error correction is 2.26 ns.In terms of PPP convergence, the convergence time of the B1I+B3 signal combination using GFZ BeiDou multi-GNSS(GBM) products is the quickest in the north,east and up directions, with the highest final convergency accuracy. The second is B1I + B3I(PPP-B2b), and B1c + B2a(PPP-B2b) is at the last.Conclusions:Summarizing the above discussions, BDS-3 PPP-B2b signals is capable of providing regional PPP service in China.

关 键 词：北斗三号卫星导航系统 PPP-B2b 精密单点定位 全球连续监测评估系统 收敛时间 定位精度 

分 类 号：P228[天文地球—大地测量学与测量工程]