Abstract:Adopting precise satellite orbits and clocks provided by GFZ, data from MGEX are processed to analyze the performance of BDS carrier phase time and frequency transfer. The results show that the accuracy of BDS time transfer is 0.2 ns when the average number of visible satellites is 10.1 at KARR, which is equivalent to GLONASS and GPS. When the average number of visible satellites is 6.9 at PTVL, the average TDOP is obviously bigger than GLONASS and GPS, and the accuracy of time transfer is only 068 ns, which is significantly worse than GLONASS and GPS. At present, BDS convergence time is significantly longer than GLONASS and GPS, due to the lack of global tracking stations and fewer MEO satellites. The frequency transfer result and frequency stability of the three systems are basically equivalent and have the same change trend. As the station KARR, PTVL is not equipped with atomic clocks, the frequency transfer results and frequency stability are relatively poor.
YU Heli,HAO Jinming,YANG Jianwei et al. Performance Analysis of BDS Carrier Phase Time and Frequency Transfer at KARR and PTVL[J]. jgg, 2018, 38(1): 59-63.