Researches on real-time precise point positioning performance based on combined SSR corrections

The real-time precision point positioning depends largely on the accuracy of the satellite orbit and clock bias. This paper provide a high-precision, stable satellite orbit and clock bias for real-time precise point positioning by combined SSR corrections with broadcast ephemeris. Compared with the single SSR correction source, the missing rate of satellite orbit and clock corrections decreased by 0.39% and 2.14% respectively. Through the precise point positioning analysis of 7 days observation data with 3 IGS stations, the fastest convergence time is within 20 min and the positioning accuracy is better than 2 cm or even millimeter level in static positioning mode, the positioning accuracy in dynamic mode is decimeter level.