In order to analyze the positioning accuracy and convergence speed of the GPS/BDS-3 combina-tion precise point positioning model in different latitude regions,this paper selects the observation data of 7 stations of MGEX(Multi-GNSS experiment)for 14 consecutive days.The PPP positioning performance was analyzed for the combination of GPS/BDS-3,which compared with BDS-3 and GPS single system.The results show that no matter in the static positioning or dynamic positioning mode,the ionosphere is more active in low-latitude regions,resulting in poor data quality,the convergence time of the stations is longer than that of high-latitude stations.In addition,in the static positioning mode,the positioning accuracy of the GPS/BDS-3 combination is better than 0.8 cm in the horizontal and 1.4 cm in vertical.The GPS/BDS-3 combination improves the positioning accuracy of the BDS-3 system by 26.3％in the horizontal and 42.9％in vertical.In the dynamic positioning mode,the GPS/BDS-3 combination has a positioning accuracy of bet-ter than 1.8 cm in horizontal and better than 3.8 cm in vertical.The GPS/BDS-3 combination improves the positioning accuracy of the BDS-3 system by 35.6％in the horizontal and 56.1％in vertical.
关键词
GPS/BDS-3/精密单点定位/定位精度/收敛时间
Key words
GPS/BDS-3/Precise point positioning/Positioning accuracy/Convergence time
维普
万方数据