Precise point positioning(PPP)ambiguity resolution(AR)can significantly improve the accuracy and convergence speed of precision positioning.The ambiguity resolution of BDS-3 is a-chieved by adding internal system bias between BDS-2 and BDS-3,and the effect of BDS-3 PPP ambiguity resolution is comprehensively evaluated based on static data,simulated kinematic data from MGEX stations and real-time data from vehicle-borne experiments.The results show that,compared with the float solution,the BDS-3 PPP ambiguity resolution can significantly improve the accuracy and convergence speed of PPP,with the static accuracy improvement of about 37.4％,26.2％,and 20.1％in the three directions of the east,north and up,respectively.For the simulated kinematic BDS-3 PPP ambiguity resolution the accuracy is improved by about 38.3％,27.2％,and 11.1％.For real-time data,the accuracy after ambiguity resolution is im-proved by 40.4％integrated in the 3D direction.In addition,based on twice the positioning accu-racy of the float solution stabilized in the east,north,and up directions after BDS-3 PPP ambiguity resolution,the static positioning time can be improved by 63.5％,64.0％,and 40.3％,respectively and the simulated kinematic positioning time can be improved 58.7％,56.8％and 25.4％,respectively and the convergence time of the vehicle-borne experiment in the 3D direction is 30.0 min.The above re-sults prove the effectiveness of the proposed method and the improvement of PPP ambiguity reso-lution.
BDS-2BDS-3Internal system bias(ISB)Precise point positioning ambiguity reso-lution(PPP AR)
维普
万方数据
