A Single-Station Ionospheric Model and Satellite DCB Elaboration Method Based on Multi-frequency GPS/BDS Data

Ionospheric errors and satellite DCB are important error sources in precise positioning. For area augmentation system, the conventional method is to precisely correct the errors by using the single monitoring stations. For practical application of the area augmentation system of GPS/BDS, this paper uses multi-frequency GPS/BDS data to establish single-station ionospheric model and solves satellites DCB, then the effectiveness of the proposed method is validated with Urumqi iGMAS station data of surveying. The result shows that the relative errors between the method of single-station ionosphere model and the GIM of CODE are controlled within 3.5 TECU; the relative errors between the calculated GPS satellites DCB and CODE published DCB are controlled within 0.5 ns; the relative errors between the calculated BDS satellites DCB and IGG published DCB are controlled less than 1.7 ns; the stability of GPS satellites DCB is better than BDS satellites DCB; and stability of IGSO satellites DCB is better than MEO and GEO satellites.