GPS/BDS/Galileo/GLONASS实时精密单点定位性能评估  

GPS/BDS/Galileo/GLONASS real-time precision point positioning performance evaluation

作　　者：谭春波 高猛[1] 孟子恒 曹志华 TAN Chunbo;GAO Meng;MENG Ziheng;CAO Zhihua(School of Geomatics,Liaoning Technical University,Fuxin,Liaoning 123000,China)

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000

出　　处：《导航定位学报》2024年第4期90-98,共9页Journal of Navigation and Positioning

基　　金：国家自然科学基金项目(41904037,42074012,42030109);辽宁省重点研发计划项目(2020JH2/10100044);辽宁省“兴辽英才计划”项目(XLYC2002101,XLYC2008034,XLYC2002098)。

摘　　要：随着卫星导航系统的迅速发展及人们对实时高精度定位性能日益增大的需求,越来越多的分析中心开始提供支持多系统的状态空间表述(SSR)产品。因此评估不同分析中心产品在不同系统组合下的定位性能十分必要。本文选取全球范围内的20个测站,对中国科学院(CAS)、武汉大学(WHU)和法国空间研究中心(CNES)3个分析中心提供的实时产品进行全球定位系统(GPS)/北斗卫星导航系统(BDS)/伽利略卫星导航系统(Galileo)/格洛纳斯全球卫星导航系统(GLONASS)实时精密单点定位(PPP)处理,并从实时产品可用性、收敛时间及定位性能进行分析。实验结果表明:WHU中心提供的GPS卫星可用性最好,GLONASS系统较差,且缺失了2颗卫星,CAS播发的BDS实时产品最好,提供了全部的BDS卫星改正数;静态模式下双系统组合中GPS+BDS组合的收敛时间最短,动态模式下双系统组合中GPS+Galileo的收敛时间最短,且在动态模式下,所有分析中心的GPS+Galileo+BDS+GLONASS组合收敛时间都明显优于GPS+Galileo+BDS组合;单系统中GPS的定位精度最优,静态模式下高程方向上优于2.5 cm,水平方向上优于1.7 cm;动态模式下高程方向上优于6.5 cm,水平方向上优于3.1 cm;但加入GLONASS的四系统组合并不能明显地提高定位精度。With the rapid development of satellite navigation systems and the increasing demand for real-time high-precision positioning performance,more and more analysis centers have begun to provide state space representation(SSR)products that support multi-global navigation satellite system(GNSS).Therefore it is essential to evaluate the positioning performance of different analysis center products with different combinations of systems.In this paper,20 stations were selected globally,and real-time precise point positioning(PPP)was processed on real-time products provided by three analysis centers,namely,Chinese Academy of Sciences(CAS),Wuhan University(WHU),and Centre National d’Etudes Spatiales(CNES).And three analysis centers were processed for global positioning system(GPS)/BeiDou navigation satellite system(BDS)/Galileo satellite navigation system(Galileo)/global'naya navigatsionnaya sputnikovaya sistema(GLONASS)real-time PPP and analyzed in terms of realtime product availability,convergence time and convergence performance.The results of the experiment indicated that the GPS satellites provided by the WHU center had the best availability,whereas the number of GLONASS system corrections was poor due to the BDS satellites.In static mode,the GPS+BDS combination has the shortest convergence time among dual-system combinations,absence of two satellites.On the other hand,CAS broadcast BDS real-time products performed best,providing corrections for all while in kinematic mode,the GPS+Galileo combination had the shortest convergence time.Additionally,in kinematic mode,the convergence time of all analysis centers'GPS+Galileo+BDS+GLONASS combination was significantly better than that of the GPS+Galileo+BDS combination.In single-system mode,GPS had the best positioning accuracy,with static mode achieving a vertical accuracy better than 2.5 cm and a horizontal accuracy better than 1.7 cm.In kinematic mode,the vertical accuracy was better than 6.5 cm and the horizontal accuracy was better than 3.1 cm.However,incorporating GL

关 键 词：精密单点定位(PPP) 实时 多全球卫星导航系统(GNSS)组合 状态空间表述 

分 类 号：P228[天文地球—大地测量学与测量工程]