Abstract: For the current research on the single point positioning of the new B1C and B2a signals of the MEO satellite (BDS-3M) in the BeiDou Satellite Navigation System (BDS-3),this paper conducts a dual-frequency single point positioning experiment based on the new signals of B1C and B2a. Combined with data from five tracking stations of iGMAS for 10 consecutive days, data quality analysis,the dual-frequency single point positioning (SPP) and dual-frequency precise point positioning (PPP) are researched,and compared with GPS L1,L2 signals and BDS-3 B1I,B3I signals.The experimental results show that the accuracy of the new BDS-3 signal in the directions of E, N and U is better than that of 10, 12 and 11 m respectively, and there is some difference between the accuracy of the dual-frequency pseudo-range single point positioning of L1 and L2 GPS and the dual-frequency pseudo-range single point positioning of the old BDS-3. In terms of precise singlepoint positioning, the convergence speed of BDS-3 new frequency point is slightly lower than that of GPS, and the new signal of BDS-3 can reach the accuracy of dm level in the three directions of E, N and U.

Key words: BeiDou Satellite Navigation System, B1C, B2a, pseudo-range single point positioning, static precise point positioning