Abstract This paper analyzes the characteristics of the inter-system bias(ISB) parameters of Beidou-2(BDS-2) B1I/B3I and Beidou-3(BDS-3) B1I/B3I, B1C/B2a signals. It then evaluates BDS-2/BDS-3 static and kinematic precise point positioning(PPP) performance when using B1I/B3I and B1C/B2a signals alone. The experimental results show that the ISB parameters between BDS-2 and BDS-3 B1C/B2a signals are greater than those of B1I/B3I signals, and both have better intra-day and inter-day stability. Compared with single BDS-2, the combination of BDS-2 and BDS-3 can significantly improve the positioning performance of static and kinematic PPP, the convergence time is shortened by more than 51.9%, and the positioning accuracy is improved by more than 46.1%. Compared to B1I/B3I signal, the convergence time of PPP is shortened when the BDS-3 B1C/B2a signal participates in the PPP solution. When the BDS-2/BDS-3 ISB parameters are estimated, the PPP convergence time in static and kinematic modes is shortened by 8.8% and 12.6%, respectively, and the positioning accuracy is improved by 7.1%.
