In this paper, a method to estimate the satellite DCBs and receiver DCBs is proposed. The proposed method consists of many local filters and single fusion filter. Each local filter estimates combined DCBs by utilizing dual-frequency pseudorange and carrier-phase measurements. The fusion filter gathers all the combined DCB estimate and estimation error information from each local filter. Then it discriminates satellite DCBs and receiver DCBs. The proposed method can be applied to the measurements of IGS reference stations distributed globally. To assess the accuracy of the satellite and receiver DCB estimates, satellite DCBs and receiver DCBs provided by IGS are used as a reference. By an experiments, accuracies of the satellite DCBs and receiver DCBs are about 0.5 [m], 0.3 [m], respectively.

Keywords: 위성 DCB, 수신기 DCB, instrumental bias, 전리층 지연