Abstract:

In order to study the single-star timing accuracy of the BeiDou Navigation Satellite System, based on the GPS single-star timing principle, combined with the characteristics of the BeiDou satellite multi-type constellation, this paper compiled the BDS single-star timing software. Experiments were carried out using iGMAS station data. After the original data was monitored and the anomaly information was removed, the timing results were compared with the CGS clock difference file of China Academy of Surveying and Mapping, and the BDS different orbit satellites were analyzed. BDS single-star timing accuracy under GEO/IGSO/MEO). The results show that the timing accuracy of the GEO satellite is 27.39 ns, the timing accuracy of the IGSO satellite is 18.37 ns, and the timing accuracy of the MEO satellite is 18.62 ns.

Key words: BeiDou Navigation Satellite System, single satellite timing, GEO, MEO, IGSO, timing accuracy