Quantitative analysis of BDS-3 pseudo-range positioning performance improvement by different types of BDS-3 satellites

Based on the measurement data of tracking stations released by iGMAS,the BDS-3 GEO,IGSO,MEO,and all BDS-3 satellites are analyzed for the impact of BDS-3 different types of satellites on the BDS-2 pseudorange single-point positioning performance.The impact of satellite visibility, PDOP value, and pseudorange single-point positioning accuracy.The research found that BDS-3 satellites have different degrees of improvement in BDS-2 satellite visibility,satellite space geometry and pseudorange single-point positioning accuracy.MEO satellites are better than IGSO satellites than GEO satellites.The sum of the satellite positioning performance improvements to BDS-2 is the same as that of all BDS-3 satellite positioning performance improvements to BDS-2.