Bulletin of Surveying and Mapping ›› 2020, Vol. 0 ›› Issue (1): 30-34.doi: 10.13474/j.cnki.11-2246.2020.0007

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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

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

CLC Number: