Abstract：We comprehensively evaluate the RTPPP service performance of three widely used GNSS open source software programs: BNC, RTKLIB and PPPWIZARD. We select nine IGS-MGEX observation stations evenly distributed all over the world to analyze and compare the integrity rates of data streams from real-time GPS, GLONASS and GALILEO as received by the three software programs. The convergence speed, positioning accuracy and data efficiency of the different software programs are evaluated. The results of numerical examples show that: 1) The communication stability of the three software programs is high and the real-time data integrity rate is basically above 96%. In comparison, the real-time data integrity rate of PPPWIZARD is the best, BNC takes the second place, while RTKLIB is relatively poor. 2) Using the data of the triple systems, BNC, RTKLIB and PPPWIZARD software programs converge to three-dimensional point position with precision better than 0.5m at about 14 min, 82 min and 12 min. 3) In terms of the accuracy of real-time positioning, the accuracy of BNC, RTKLIB and PPPWIZARD software in the horizontal and vertical directions are respectively at about 9 cm and 12 cm, 16 cm and 20 cm, 7 cm and 12 cm, in which PPPWIZARD adopts ambiguity fixed solution. 4) The data efficiency index of the three software programs do not share very much in common, among which BNC and PPPWIZARD data efficiency reach about 95%, and RTKLIB data efficiency is lower than 73%. In general, the service performance indicators of BNC and PPPWIZARD's real-time PPP are basically the same, while RTKLIB results are relatively poorer.
DU Shi,HUANG Guanwen,GE Yulong et al. Performance Evaluation of BNC/RTKLIB/PPPWIZARD Real-Time Precise Point Positioning Service[J]. jgg, 2021, 41(2): 125-130.
