The Performance Analysis of Multi-system Integrated Precise Point Positioning (PPP)

Based on the analysis of the GNSS navigation and positioning, this paper studies the key technology and superiority of the PPP based on single difference between satellites. The true observation data are used to compare and analyze the precision and convergence time of PPP based on GPS\GLONASS, GPS\BDS dual system, and GPS\GLONASS\BDS triple system. Finally, the conclusion is drawn as the following: GPS\GLONASS\BDS triple-system PPP technology has the optimal performance on positioning accuracy and convergence time. GPS\GLONASS dual-system PPP almost has the same performance with triple-system PPP. GPS\BDS has no impact on improving performance of GPS PPP, but can improve the performance of BDS PPP greatly.