Study on range signal evaluation and precise point positioning application of Beidou navigation satellite system (BDS)

With the developing of global navigation system, the high quality of positioning navigation and time service are gradually provided by Beidou navigation satellite system (BDS) in China. In this paper, the data of BDS receiver operated in time keeping laboratory of national time service center (NTSC) are used, the BDS range signal evaluation and precise point positioning (PPP) are studied. Based on the measurements data, the signal-to-noise ratio and multipath effect of B1 and B2 frequencies are analyzed. And the algorithm of BDS PPP is discussed in detail. The precision positioning and timing information is calculated by using the data and the products of precise orbit and precise satellite clock from MGEX of IGS. The result show that reception performance of B2 frequency point is better than B1 frequency point, and the BDS PPP error of X, Y, Z kept at cm level. The short term frequency stability of time difference between local time and IGST is in 10-14, and the performance is approximately the same as global positioning system (GPS). It is proved that the BDS can be used in ns level time transfer. © 2017, Science Press. All right reserved.