测绘通报 ›› 2020, Vol. 0 ›› Issue (1): 30-34.doi: 10.13474/j.cnki.11-2246.2020.0007

• 导航与位置服务 • 上一篇    下一篇

BDS-3实时精密单点定位精度分析

戴金倩1, 吴迪2,3, 戴小蕾4, 楼益栋4   

  1. 1. 武汉大学测绘学院, 湖北 武汉 430079;
    2. 南宁师范大学北部湾环境演变与资源利用教育部重点实验室, 广西 南宁 530001;
    3. 南宁师范大学广西地表过程与智能模拟重点实验室, 广西 南宁 530001;
    4. 武汉大学卫星导航定位技术研究中心, 湖北 武汉 430079
  • 收稿日期:2019-08-11 修回日期:2019-09-26 发布日期:2020-02-10
  • 通讯作者: 吴迪。E-mail:wudi324@whut.edu.cn E-mail:wudi324@whut.edu.cn
  • 作者简介:戴金倩(1998-),女,主要研究方向为卫星精密定轨定位算法。E-mail:2945297691@qq.com
  • 基金资助:
    北部湾环境演变与资源利用教育部重点实验室(南宁师范大学)开放基金(NNNu-KLOP-K1914);2018年度广西高校中青年教师基础能力提升项目(2018KY0357)

The real-time PPP precision analysis based on BDS-3

DAI Jinqian1, WU Di2,3, DAI Xiaolei4, LOU Yidong4   

  1. 1. School of Geodsy and Geomatics, Wuhan University, Wuhan 430079, China;
    2. Key Laboratory of Environmental Evolution and Resource Utilization in Beibu Gulf, Ministry of Education, Nanning Normal University, Nanning 530001, China;
    3. Key Laboratory of Surface Processes and Intelligent Simulation in Guangxi, Nanning Normal University, Nanning 530001, China;
    4. GNSS Center, Wuhan University, Wuhan 430079, China
  • Received:2019-08-11 Revised:2019-09-26 Published:2020-02-10

摘要: 基于武汉大学自主研发的GNSS高精度数据处理软件PANDA,本文采用MGEX网测站BDS-2/BDS-3连续一周的观测数据,通过仿实时处理BDS-3精密轨道与钟差产品进行BDS-3卫星实时精密轨道产品重叠弧段评估,实时轨道径向精度优于10 cm,实时钟差STD优于0.3 ns。在此基础上验证分析了BDS-2、BDS-3及BDS-2+BDS-3融合的实时静态PPP与实时动态PPP定位。试验结果表明:BDS-3静态PPP定位精度水平优于2 cm,高程优于4 cm;BDS-2+BDS-3联合实时动态PPP收敛时间相较BDS-2分别提升了约38.2%、75.0%、49.7%;收敛后E方向精度优于3 cm,N方向精度优于2 cm,平均提升了38.2%,高程方向精度优于6 cm,平均提升了64%。

关键词: 北斗全球卫星导航系统, 实时精密定轨, 实时精密单点定位, 精度分析, 收敛分析

Abstract: To provide real-time BDS-3 satellite precision orbit and clock products,the daily observations of DOY 143-150 in 2019 from MGEX stations which were recorded in simulated real-time mode were selected to calculate by PANDA in this paper. The evaluation of overlapping arcs of BDS-3 satellite real-time precision orbit products shows that the radial accuracy of real-time orbit is better than 10 cm, and the real-time clock difference STD is better than 0.3 ns. On this basis, the real-time static PPP and real-time dynamic PPP positioning based on the BDS-2, BDS-3 and the fusion of BDS-2+BDS-3 were verified and analyzed. The experimental results show that the horizontal positioning accuracy of BDS-3 static PPP is better than 2 cm and the elevation accuracy is better than 4 cm, the convergence time of BDS-2+BDS-3 combined real-time dynamic PPP is 38.2%, 75.0%, 49.7% higher than BDS-2 respectively. After convergence, the E direction accuracy is better than 3 cm, the N direction accuracy is better than 2 cm, the average improvement is 38.2%.Besides,the elevation direction accuracy is better than 6 cm,which increases 64% averagely.

Key words: BeiDou Satellite Navigation System, real-time precise orbit determination, real-time precise point positioning, accuracy analysis, convergence analysis

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