Real Time Precise Satellite Clock Estimation for Quad-System GPS/GLONASS/GALILEO/BDS

Real-time prediction of the approximate non- homogeneous white exponential law BDS clock bias sequences: modelling and strategy

“…As an onboard reference time, the satellite clock directly affects the accuracy of time-frequency transmission, navigation, and positioning4 4-5 . As we all know, under the influence of the external environment, the onboard time kept by the satellite clock cannot be completely synchronized with the standard system time [6][7] . Therefore, modeling and predicting satellite clock bias are essential, especially for ensuring real-time dynamic, precise point positioning and optimizing the clock bias parameters of the navigation messages.…”