Bulletin of Surveying and Mapping ›› 2022, Vol. 0 ›› Issue (6): 12-17,39.doi: 10.13474/j.cnki.11-2246.2022.0164.

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BDS-3+GPS precise point positioning modeling and performance analysis

CHEN Yibiao1,2, BEI Jinzhong2, GU Shouzhou2, YANG Lijun2,3, WANG Hongbin4, CHU Bin5,6   

  1. 1. Liaoning Technical University, Fuxin 123000, China;
    2. Chinese Academy of Surveying and Mapping, Beijing 100036, China;
    3. Shandong University of Science and Technology, Qingdao 266590, China;
    4. The Second Geodetic Surveying Brigade of Ministry of Natural Resources, Harbin 150025, China;
    5. Hunan Institute of Surveying and Mapping Technology, Changsha 410007, China;
    6. China Academy of Surveying and Mapping in Hunan Branch, Changsha 410007, China
  • Received:2021-09-13 Published:2022-06-30

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Abstract: The BeiDou navigation satellite system is officially completed and put into operation in July 2020. Based on B1I and B3I, the BDS-3 satellite adds B1C and B2a civil frequencies. In order to verify the positioning performance of BDS-3 with different frequencies combined with GPS, the PPP positioning performance of BDS-3(B1I+B3I)+GPS and BDS-3(B1C+B2a)+GPS is analyzed, and compared with that of BDS-3. The results show that in static positioning, the elevation direction accuracy of BDS-3(B1C+B2a)+GPS is lower than that of BDS-3(B1I+B3I)+GPS, the horizontal accuracy is similar, and the convergence time is reduced by 9%; The horizontal accuracy of BDS-3(B1C+B2a)+GPS is better than 1 cm, and the elevation accuracy is better than 2 cm. Compared with BDS-3, the positioning accuracy is improved by about 10%~25%, and the convergence time is reduced by 17%~24%. In kinematic positioning, the positioning accuracy of BDS-3(B1C+B2a)+GPS is equivalent to that of BDS-3(B1I+B3I)+GPS, and the convergence time is reduced by 14%; The horizontal accuracy of BDS-3(B1C+B2a)+GPS is better than 3 cm, and the elevation accuracy is better than 4 cm. Compared with BDS-3, the positioning accuracy is improved by about 31%~38%, and the convergence time is reduced by about 52%~58%.

Key words: precise point positioning, BDS-3, BDS-3+GPS, positioning accuracy, convergence time

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