基于北斗3号PPP-B2b信号的实时精密单点定位方法研究  

Research on Real-time Precise Point Positioning Method Based on BDS-3 PPP-B2b Signals

作　　者：邓陈喜 姜维 王剑[1,2,3] 蔡伯根 DENG Chenxi;JIANG Wei;WANG Jian;CAI Baigen(School of Electronics and Information Engineering,Beijing Jiaotong University,Beijing Jiaotong University,Beijing 100044,China;State Key Laboratory of Rail Traffic Control and Safety,Beijing Jiaotong University,Beijing 100044,China;Beijing Engineering Research Center of EMC and GNSS Technology for Rail Transportation,Beijing 100044,China)

机构地区：[1]北京交通大学电子信息工程学院,北京100044 [2]北京交通大学轨道交通控制与安全国家重点实验室,北京100044 [3]北京市电磁兼容与卫星导航工程技术研究中心,北京100044

出　　处：《铁道学报》2024年第2期63-73,共11页Journal of the China Railway Society

基　　金：国家自然科学基金(U1934222,62027809);国家铁路局课题计划(KF2021-028)。

摘　　要：针对IGS精密产品存在相应时延且在列车长时间高速运行下不便联网下载的问题,研究基于BDS-3提供的PPP-B2b服务的实时PPP方法。基于广播星历和PPP-B2b校正模型获取PPP-B2b实时精密产品,基于PPP模型及模糊度在线解算方法得到实时动/静态PPP结果,并利用实测数据对PPP-B2b轨道及钟差修正量级、实时PPP性能进行分析。20 min实验结果表明:实时动态PPP的北向定位精度为0.4172 m,东向定位精度为0.3041 m;实时静态PPP的北向定位精度为0.1005 m,东向定位精度为0.1741 m。基于PPP-B2b服务的实时PPP具有时效性优势,静态性能优于传统基于IGS精密产品的PPP,动态性能与之相当。A real-time PPP method based on the BDS-3 PPP-B2b service was investigated to address the problems of IGS precision products such as corresponding time delays and inconvenience in online downloading under long high-speed train operation.By obtaining real-time PPP-B2b precise products based on broadcast ephemeris and PPP-B2b correction model,and by obtaining real-time kinematic/static PPP results based on PPP model and onlineambiguityresolution method,this paper analyzed PPP-B2b orbit and clock offset correction magnitude and real-time PPP performance by using measured data.The 20-minute experimental results show that the northward positioning accuracy of real-time kinematic PPP is 0.4172 m with the eastward positioning accuracy of 0.3041 m.The northward positioning accuracy of real-time static PPP is 0.1005 m with the eastward positioning accuracy of 0.1741 m.Real-time PPP based on PPP-B2b service has the advantage of timeliness,with static performance better than traditional PPP based on IGS precise products,and kinematic performance comparable to it.

关 键 词：PPP-B2b 列车定位 实时 精密单点定位 

分 类 号：U284[交通运输工程—交通信息工程及控制]