数据与计算发展前沿 ›› 2025, Vol. 7 ›› Issue (1): 108-118.

CSTR: 32002.14.jfdc.CN10-1649/TP.2025.01.008

doi: 10.11871/jfdc.issn.2096-742X.2025.01.008

• 技术与应用 • 上一篇    下一篇

电离层和地形复杂区域北斗/GNSS实时PPP性能及大气分析

肖斌宸1,2(),叶飞1,2,*(),叶险峰1,曾翔强2   

  1. 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
  • 收稿日期:2024-08-02 出版日期:2025-02-20 发布日期:2025-02-21
  • 通讯作者: *叶飞（E-mail: feiye_bds@126.com）
  • 作者简介:肖斌宸，湘潭大学土木工程学院，硕士研究生，研究方向为实时精密单点定位研究与应用。
    本文负责论文中的实验与初稿撰写。
    XIAO Binchen is a graduate student at the School of Civil Engineering, Xiangtan University. His research interests include real-time precision po-int positioning research and application.
    In this paper, he is responsible for the experiment and the paper drafting.
    E-mail:724407138@qq.com|叶飞，湖南省测绘科技研究所，副总工程师/高级工程师，研究方向为北斗时空基准与增强服务体系构建基础理论及其高精度定位和电离层/对流层建模/监测应用。
    本文负责论文的研究指导与关键技术攻关。
    YE Fei is a Deputy Chief Engineer/Senior Engineer at the Hunan Institute of Geomatics Sciences and Technology. His research focuses on the basic theory of the construction of the BeiDou spatio-temporal reference and enhanced service system and its high-precision positioning and ionosphere/troposphere modeling/monitoring applications.
    In this paper, he is responsible for guidance and key technologies of the thesis.
    E-mail: feiye_bds@126.com
  • 基金资助:
    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);湖南省自然科学基金(2023JJ60560);博士科研启动项目(2017111701517);国家自然科学基金(42004016);国家自然科学基金(42404042)

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

XIAO Binchen1,2(),YE Fei1,2,*(),YE Xianfeng1,ZENG Xiangqiang2   

  1. 1. School of Civil Engineering, Xiangtan University, Xiangtan, Hunan 411105, China
    2. BeiDou High-Precision Satellite Navigation and Location Service Hunan Engineering Research Center, Hunan Institute of Geomatics Sciences and Technology, Changsha, Hunan 410007, China
  • Received:2024-08-02 Online:2025-02-20 Published:2025-02-21

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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HNCORS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。

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

Abstract:

[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.

Key words: PPP-SSR, real-time orbit/clock, convergence time, positioning accuracy, atmospheric analysis, BDS/GNSS