The evaluation of BeiDou time transfer performance

The BeiDou regional navigation system has been continuously running for about three years since it starts providing PVT service in December 2012. During this period, it provides more stable positioning and timing service to lots of users in Asia-pacific region. In this paper, the current time transfer performance of BeiDou is tested and analyzed, the performance of its time transfer service which is relative to GPS and other mature satellite navigation system is evaluated. The time transfer technology performance of BDS, such as one-way timing, common view, and precision point positioning time transfer is analyzed and compared with GPS. The experiment of short distance (30km) and long distance (1000km above) time transfer is carried out to evaluate the performance between GPS and BDS. At end of paper, the results of short distance time transfer on GPS and BDS is compared and verified with GPS PPP time transfer. The results of the time transfer performance of the Beidou are in good agreement with GPS time transfer technology, and the relative accuracy is reached sub nanoseconds.