GNSS World of China

Volume 48 Issue 4
Sep.  2023
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HUANG Hong, GAO Wang, MIAO Weiwei, TENG Ling, DONG Fangyun, PAN Shuguo. RTK/B2b-PPP fusion switching positioning technology based on BDS-3/GPS[J]. GNSS World of China, 2023, 48(4): 57-62. doi: 10.12265/j.gnss.2023065
Citation: HUANG Hong, GAO Wang, MIAO Weiwei, TENG Ling, DONG Fangyun, PAN Shuguo. RTK/B2b-PPP fusion switching positioning technology based on BDS-3/GPS[J]. GNSS World of China, 2023, 48(4): 57-62. doi: 10.12265/j.gnss.2023065

RTK/B2b-PPP fusion switching positioning technology based on BDS-3/GPS

doi: 10.12265/j.gnss.2023065
  • Received Date: 2023-03-28
    Available Online: 2023-08-29
  • In order to solve the problem that network real-time kinematic (RTK) communication signals are easy to be interrupted in the remote sea and desert, a switching technology of RTK/B2b-PPP fusion based on BeiDou-3 Navigation Satellite System (BDS-3)/GPS is proposed, which makes full use of the characteristics of fast convergence and high positioning accuracy of network RTK and wide coverage,single station positioning of B2b-PPP. The high-precision position coordinates obtained by network RTK are used as priori information and integrated with B2b-PPP to assist B2b-PPP converge fast. The results show that the positioning accuracy of RTK fixed solution and B2b-PPP fusion is 2.57 cm, 0.90 cm and 2.83 cm in the east (E), north (N) and up (U) directions, respectively, which is much higher than that of independent B2b-PPP positioning. In addition, after the fusion of RTK fixed solution and B2b-PPP for 1 s, it can help the instantaneous convergence of B2b-PPP. After the interruption of RTK, the initial accuracy reaches the level of cm, and gradually transitions to the independent positioning accuracy level of B2b-PPP after 0.5 h, indicating that B2b-PPP can be used as an effective means to supplement the network RTK. Can effectively maintain high precision positioning level.

     

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