The Evaluation Analysis of RDSS Timing Service for Beidou-3

Beidou-3 system has been officially built and provides services to users all over the world. RDSS time service is a time service method provided by Beidou-3. In this paper, the basic principles of RDSS one-way time service and RDSS two-way time service are discussed in detail, the monitoring and evaluation methods of RDSS time service are deeply studied, and the measured data are compared and analyzed. The experimental results show that the service accuracy of Beidou-3 is better than the published index requirements, among which the RMS of one-way service accuracy of RDSS is better than 3 ns, and the RMS of two-way service accuracy of RDSS is better than 2 ns. Compared with Beidou-2 RDSS, Beidou-3 has improved and optimized the service accuracy of RDSS, and the beam switching in the process of RDSS service will cause the fluctuation of service results, which can reach tens of nanoseconds in one-way service and several nanoseconds in two-way service.