Ultra-Rapid Satellite Clock Offset Boundary Jumps Compensation Method Based on Dynamic Adaptive Weighting

The traditional ultra-rapid satellite clock offset boundary jumps compensation method based on epoch-differenced suffers from error accumulation, which reduces the accuracy of satellite clock offset. In this paper a new compensation method based on dynamic adaptive weighting is proposed. The method makes full use of ultra-rapid satellite clock offset data from adjacent observation window. Calculate prior weights based on satellite offset dynamic characteristics, obtain satellite posterior residual through batch estimation, and compensate the satellite clock offset boundary jumps. The ultra-rapid satellite clock offset products updated 1-hour provided by WHU from DOY 060-062 in 2024 are used to verify the performance of the proposed method. The results show that, contrasted with the traditional compensation method based on epoch-differenced, the accuracy of the satellite clock offset is improved by 36.2%. In addition, the RMS and STD accuracy of PPP are improved by 13.2% and 26.2% within two hours before and after the observation window boundaries, respectively.