GPS/BDS-3 Undifferenced and Uncombined PPP Based on Broadcast Ephemeris
Abstract We analyze the error characteristics of GPS and BDS-3 satellite broadcast ephemeris, study the compensation strategy of the inaccuracy of broadcast ephemeris, and propose a SISRE compensated undifferenced uncombined positioning model. The experiment adopts the observation data of 15 MGEX stations in 2022 for one week. The results show that when a SISRE compensated undifferenced and uncombined model is adopted, the RMS of GPS and BDS-3 static three-dimensional positioning errors are about 24 cm and 23 cm, respectively. The GPS/BDS-3 dual system combination can further improve the accuracy to about 18 cm. The RMS of GPS and BDS-3 imitation dynamic 3D positioning errors are about 73 cm and 74 cm, respectively. The GPS/BDS-3 dual system combination can further improve the accuracy to about 45 cm. The positioning accuracy of SISRE compensated undifferenced and uncombined model is equivalent to that of SISRE compensated ionosphere-free combination model.
Key words :
broadcast ephemeris
GPS
BDS-3
undifferenced and uncombined
PPP
Cite this article:
PENG Huadong,QIAO Shubo,LI Linyang et al. GPS/BDS-3 Undifferenced and Uncombined PPP Based on Broadcast Ephemeris[J]. jgg, 2023, 43(12): 1281-1287.
PENG Huadong,QIAO Shubo,LI Linyang et al. GPS/BDS-3 Undifferenced and Uncombined PPP Based on Broadcast Ephemeris[J]. jgg, 2023, 43(12): 1281-1287.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2023/V43/I12/1281
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