BDS observation data quality and dynamic PPP performance analysis

In order to analyze the global data quality, dynamic precise point positioning (PPP) performance and performance differences of BeiDou Navigation Satellite System (BDS) in different regions, we select the observation data of a total of 9 Multi-GNSS Experiment (MGEX) continuous tracking stations in 3 different region, using GPS as a reference, and from the satellite visibility, pseudo-range multipath effect, data integrity rate and signal-to-noise ratio (SNR), PPP positioning accuracy and other aspects to analyze the data quality and positioning accuracy of BDS in five aspects. The results show that the satellite visibility of BDS has regional differences, and the multipath effect and SNR ratio do not show regional characteristics. The data quality of BDS-3 is better than that of BDS-2, and the data quality of BDS at different frequency points is also significantly different. Difference, poor data quality at B1I frequency points. The dynamic positioning accuracy of BDS is slightly weaker than that of GPS, and multiple systems have a significant effect on improving positioning accuracy.