Satellite Clock Offset Determination and Prediction with Integrating Regional Satellite‐ground and Inter‐satellite Data
作者单位：Beijing Satellite Navigation Center Information Engineering University
会议名称：《第五届中国卫星导航学术年会》
会议日期：2014年
学科分类：08[工学] 080401[工学-精密仪器及机械] 081105[工学-导航、制导与控制] 0804[工学-仪器科学与技术] 0825[工学-航空宇航科学与技术] 0811[工学-控制科学与工程]
基 金：Project supported by the National Natural Science Foundation of China (Grant No. 41174027) National 863 plans projects (Grant No. 2012AA8113009)
关 键 词：Navigation satellite Time synchronization Inter‐satellite link Clock offset determination Clock offset prediction.
摘 要：Time synchronization between Satellites is the foundation for satellite navigation system,which is realized by satellite‐ground clock offset determination and ***,satellite clock offset determination and prediction is a key technique for satellite navigation *** present,precise time synchronization between satellites by inter‐satellite link and auto‐time synchronization is considered to be important development direction for navigation domain.A satellite clock offset determination and prediction method by integrating regional satellite‐ground observation data and inter‐satellite observation data is *** first introduce some common used methods for satellite clock determination,and then discuss the principle and data process model for satellite clock determination based on inter‐satellite link *** provide the method of Helmert variance components estimation to determine and predict satellite clock based on integrating satellite‐ground and inter‐satellite observation *** last,we analysis the performance for our method by using real observation data and simulation data,the result shows the method overcomes the defects of regional monitoring network and improves the precise of prediction form 8ns to 1.5ns for MEO satellite when the satellites can’t been *** method also increases the satellite clock data when the satellites can be observed,which can improved the precise and reliability for determination and prediction satellite clock offset.