Accuracy analysis of BDS-3 pseudo-range single point positioning

The basic system of BDS-3 has been completed. The global service was officially launched on December 27, 2018. The data of 13 international GNSS monitoring and assessment system (iGMAS) tracking stations were selected.These stations are evenly distributed globally. Pseudo-range single-point positioning studies in different positioning modes were carried out and its PDOP,number of visible satellite and pseudo-range single-point positioning result were analyzed. The results show that: BDS-3 single-frequency positioning accuracy from high to low as: B1C,B2a,B1I,B3I;BDS-3 dual-frequency positioning accuracy from high to low as: B1C／B2a,B1I／B3I. In the AsiaPacific region,the BDS-2／BDS-3 positioning accuracy improvement is more than 14％ compared with BDS-2.