BeiDou regional navigation system network solution and precision analysis

In this paper, BeiDou post-mission high precision orbit determination and positioning in network solution mode are researched and implemented under current BeiDou regional navigation system conditions. We made an in-depth analysis of the influence factors, such as ambiguity resolution, orbit precision, reference station selection, inter-station distance, on precision of BeiDou network solution. We analysed the different ambiguity resolution strategy among GEO, IGSO and MEO, and its impact on precision orbit determination and network solution positioning. We conducted an experimental comparison of BeiDou network solution with BeiDou precise point positioning (PPP). With long-term continuous measurement data from Wuhan University BeiDou Experimental Tracking Stations processed, the results show that ambiguity resolution improves all the GEO, IGSO and MEO orbit precision, especially for the along direction and 3D RMS of GEO, IGSO and MEO is 155, 33 and 28 cm respectively, the radial precision is basically better than 10 cm. BeiDou one-day network solution positioning precision is better than 1 cm in horizontal and better than 2 cm in vertical, which is slightly better than BeiDou PPP precision.