The Construction Method of Ionospheric Delay Model with Combined BDS Phase and Range Observation

Abstract

The ionospheric delay model is a reliable method to reduce the influence of ionospheric delay. The phase smoothed pseudorange observations are always used to construct ionospheric delay model. However, the accuracy of the constructed ionosphere model is affected by precision of phase smoothed pseudorange observations and the number of base stations. This contribution presents a construction method of ionospheric delay model with combined BDS phase and range observation. The observations of ionospheric delay is constructed by precise point positioning (PPP) with original observations. At the same time, the polynomial model is used to ionosphere modeling. Finally, the validity of this method is verified using BDS and GPS data. The bias of ionosphere model is less than 1 m and the standard deviation is better than 0.4 m.