Performance Analysis of GPS／BDS／GALILEO Multi-system Combination Pseudo-range Point Positioning

Aiming at the difference of GPS,BDS,GPS／BDS,GPS／GALILEO,BDS／GALILEO,GPS／BDS／GALILEO intermodulation pitch single point positioning accuracy, the multi-system fusion pseudorange single point positioning The mathematical model and the error term processing method are studied. According to the experimental data of Hong Kong CORS station HKNW site, in the case of cutoff satellite elevation angles of 10, 15, 20, 30, and 40 degrees, the GPS, BDS, GPS／BDS, GPS／GALILEO, BDS／GALILEO and GPS／BDS／GALILEO pseudo range single point positioning calculations are carried out. The results show that the positioning accuracy of GPS／BDS／GALILEO system is better than that of single system in X, Y and Z directions, and the positioning result is more stable. Especially when the cutoff height angle reaches 30°and 40°,the positioning accuracy of single system The GPS／BDS／GALILEO combination system can still meet the requirements of positioning.