GPS/BDS实时SSR产品质量评估及其PPP性能分析  

Quality Evaluation and PPP Performance Analysis of GPS/BDS Real-Time SSR Products

作　　者：苏春阳 舒宝 郑蕾[4] 田云青 雷体俊 穆雪枫 王利[1,2,3] SU Chunyang;SHU Bao;ZHENG Lei;TIAN Yunqing;LEI Tijun;MU Xuefeng;WANG Li(College of Geological Engineering and Geomatics,Changan University,Xian 710054,China;State Key Laboratory of Geographic Information Engineering,Xian 710054,China;Key Laboratory of Western Chinas Mineral Resources and Geological Engineering,Ministry of Education,Xian 710054,China;Xian Institute of Applied Optics,Xian 710054,China)

机构地区：[1]长安大学地质工程与测绘学院,陕西西安710054 [2]地理信息工程国家重点实验室,陕西西安710054 [3]西部矿产资源与地质工程教育部重点实验室,陕西西安710054 [4]西安应用光学研究所,陕西西安710065

出　　处：《武汉大学学报(信息科学版)》2025年第4期714-726,共13页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金(42004024,41877289,42174006,42127802);国家重点研发计划(2021YFC3000501,2021YFC3000503);中国博士后科学基金(2020M673321)。

摘　　要：近年来,随着多系统全球导航卫星系统(global navigation satellite system,GNSS)的迅速发展以及实时高精度应用需求的日益增长,国际GNSS服务分析中心(International GNSS Service,IGS)提供的状态空间表述(state space representation,SSR)产品越来越丰富。评估不同分析中心的GNSS实时产品及其定位性能对用户具有重要参考价值。对中国科学院(Chinese Academy of Sciences,CAS)、法国太空研究中心(Centre National d’Etudes Spatiales,CNE)、德国宇航中心(Deutsches Zentrum für Luft-und Raumfahrt,DLR)、西班牙航天与防务公司(GMV Aerospace and Defense,GMV)、德国地学研究中心(Deutsches GeoForschungsZentrum,GFZ)、武汉大学(Wuhan University,WHU)6个分析中心的GPS/北斗卫星导航系统(BeiDou satellite navigation system,BDS)SSR产品的可用性、精度和实时精密单点定位性能进行了评估。实验结果表明:CAS播发的GPS卫星可用性最高,提供了所有32颗GPS卫星的SSR改正数;CAS、GFZ、WHU 3家分析中心的BDS卫星可用性相对较高,提供了15(BDS-2)+27(BDS-3)卫星的SSR改正数。在6个分析中心中,WHU的GPS卫星的三维轨道精度和钟差精度均为最佳;不同分析中心GPS卫星的信号空间测距误差(signal-in-space ranging errors,SISRE)普遍优于5 cm,不同分析中心GPS卫星的SISRE值的大小顺序为:WHU<GMV<CNE<DLR<GFZ<CAS;BDS卫星轨道钟差精度相对较差,表现最优的WHU分析中心的BDS-2和BDS-3的中地球轨道卫星精密产品的SISRE值分别为8.83、5.91 cm。在单GPS动态PPP模式下,DLR的收敛速度最慢,GFZ收敛速度最快;加入BDS卫星以后,定位精度无显著差异,但能够有效提升收敛速度。Objectives:In recent years,the rapid development of multi-system global navigation satellite systems(GNSS)and the growing demand for real-time,high-precision applications have led to an increasing variety of state space representation(SSR)products provided by the International GNSS Service(IGS).Evaluating the accuracy and availability of GNSS real-time precise products and their positioning performance across different analysis centers is of great importance for users.We aim to assess the availability and accuracy of real-time SSR products and their impact on real-time precise point positioning(PPP)from six commonly used analysis centers.Methods:We evaluated the epoch availability and satellite availability of SSR corrections,as well as the accuracy of GPS and BeiDou satellite navigation system(BDS)precise orbit and clock products.Simulated kinematic GPS and GPS/BDS PPP experiments were conducted to investigate the relationship between SSR product accuracy and three-dimensional(3D)position accuracy.Re⁃sults:The Chinese Academy of Sciences(CAS)exhibited the highest availability for GPS satellites,providing SSR corrections for all 32 GPS satellites.CAS,Deutsches GeoForschungsZentrum(GFZ),and Wuhan University(WHU)demonstrated the highest availability for BDS satellites,with all three providing SSR corrections for all 15 BDS-2 and 27 BDS-3 satellites,excluding BDS-3 geostationary Earth orbit(GEO)satellites.Among the SSR products from the six analysis centers,WHUs GPS satellites achieved the best 3D orbit and clock accuracy.The signal-in-space ranging errors(SISRE)for GPS satellites across all six centers were generally better than 5 cm.The SISRE ranking for GPS satellites was as follows:WHU<GMV Aerospace and Defense(GMV)<Centre National d’Études Spatiales(CNE)<Deutsches Zentrum für Luft-und Raumfahrt(DLR)<GFZ<CAS.In contrast,the orbit and clock accuracy of BDS satellites was comparatively lower.For WHU,the best-performing analysis center,SISRE values for medium Earth orbit satellites of BDS-2 and BDS-3 were 8.8

关 键 词：精密单点定位 实时轨道钟差 状态空间表述 分析中心 北斗三号 

分 类 号：P228[天文地球—大地测量学与测量工程]