电离层和地形复杂区域北斗/GNSS实时PPP性能及大气分析  

BDS/GNSS Real-Time PPP Performance and Atmosphere Analysis in Complex Ionosphere and Terrain Region

作　　者：肖斌宸 叶飞 叶险峰[1] 曾翔强 XIAO Binchen;YE Fei;YE Xianfeng;ZENG Xiangqiang(School of Civil Engineering,Xiangtan University,Xiangtan,Hunan 411105,China;BeiDou High-Precision Satellite Navigation and Location Service Hunan Engineering Research Center,Hunan Institute of Geomatics Sciences and Technology,Changsha,Hunan 410007,China)

机构地区：[1]湘潭大学,土木工程学院,湖南湘潭411105 [2]湖南省测绘科技研究所,北斗高精度卫星导航与位置服务湖南省工程研究中心,湖南长沙410007

出　　处：《数据与计算发展前沿(中英文)》2025年第1期108-118,共11页Frontiers of Data & Computing

基　　金：湖南省自然资源厅科技项目(20240105CH);湖南省科技创新计划(2023RC3217);湖南省自然科学基金(2024JJ8329,2023JJ60560);博士科研启动项目(2017111701517);国家自然科学基金(42004016,42404042)。

摘　　要：【目的】针对实时精密单点定位(Precise piont positioning,PPP)性能受电离层活动影响以及复杂区域应用适用性等问题,【方法】该文选取地处低纬度到中纬度过渡地带且地形复杂多丘陵的湖南地区,利用SSR产品开展实时精密单点定位性能及大气分析。【结果】依托HN-CORS数据的实验结果表明:在SSR产品质量评估方面,除了BDS-2卫星和BDS-3卫星中3颗IGSO卫星(C38-C40)外,其他卫星的实时轨道精度都达到了1~9cm,实时钟差精度达到0.2~0.3ns。在大气方面,湖南地区南方测站反演得到的电离层活跃度整体高于北方,而无电离层组合和非差非组合模型反演得到的对流层天顶总延迟(Zenith Total Delay,ZTD)变化趋势基本一致且差值仅在2mm左右,但是在同一地区高程较大的两个测站差值最大可达到26mm,最小为6mm。在定位性能方面,静态PPP的3D RMS/STD平均值达3.2/2.0cm,动态PPP的3D RMS/STD平均值能达到11.9/10.7cm;静态PPP的收敛时间基本上在30min以内完成,最快能达到10min,动态PPP的收敛时间基本上在60min以内完成,最快能达到13min。[Objective]According to the problem of the regional applicability of real-time precise point positioning(RT-PPP)performance and applications affected by ionospheric activity,[Methods]this paper selects the Hunan region,which is located in the transition zone between middle and low latitudes and has complex and hilly terrain,and uses State Space Representation(SSR)products to carry out RT-PPP performance and atmospheric analysis.[Result]Based on the experimental results using HNCORS data,the quality assessment of SSR products shows that,except for the three IGSO satellites(C38-C40)in the BDS-2 and BDS-3 constellations,the real-time orbits of other satellites reach an accuracy of 1-9 cm,and the accuracy of the real-time clock error reaches 0.2-0.3 ns.In terms of the atmospheric environment,the ionospheric activities inferred from the stations in the southern part of Hunan are generally higher than those from the stations in the northern part of Hunan,while the Zenith Total Delay(ZTD)trends obtained from ionosphere-free(IF)combination and undifferenced uncombined(UDUC)models are basically the same,with a difference of only about 2 mm.However,the difference between two stations in the same area with large altitude differences can be as high as 26 mm and as low as 6 mm.In terms of positioning performance,the average values of 3D RMS/STD for static PPP can reach 3.2/2.0 cm,and those for kinematic PPP can reach 11.9/10.7 cm.The convergence time for static PPP is generally within 30 minutes,with the fastest being 10 minutes.The convergence time for kinematic PPP is generally within 60 minutes,with the fastest being 13 minutes.

关 键 词：PPP-SSR 实时轨道/钟差 收敛时间 定位精度 大气分析 北斗/GNSS 

分 类 号：P352[天文地球—空间物理学] P228.4[天文地球—地球物理学]