Research on a method of real-time combination of BDS clock corrections

Real-time precise satellite orbit and clock corrections are essential foundations for real-time precise single-point positioning (PPP). Given the influence of network transmission status and observation data quality, the real-time satellite orbit and clock products provided by a single analysis center may suffer from data interruption. Therefore, this paper studies a method of real-time combination of BDS clock corrections. Performance testing of each product shows that the combined product has a higher data completeness rate than a single analysis center product. Moreover, the single MEO satellite accuracy of the combined product is improved by more than 15.35% compared to that of all analysis center products. Finally, the positioning accuracy and continuity of dynamic PPP with the combined product are superior to those of all analysis center products. The results demonstrate that the real-time combined clock correction obtained by the method is more reliable than single analysis center.