A satellite clock error correction method in the wide area differential system  

作　　者：CAI ChengLin LI XiaoHui WU HaiTao CHANG XingWang 

机构地区：[1]National Time Service Center, Chinese Academy of Sciences, Lintong 710600, China [2]Hunan Institute of Humanities, Science and Technology, Loudi 417000, China [3]Graduate University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Chinese Science Bulletin》2009年第24期4616-4623,共8页

基　　金：Supported by the National Natural Science Foundation of China (Grant No.10778715);National Basic Research Program of China (Grant No. 2007CB815502);Scientific Research Fund of Hunan Provincial Education Department (Grant No. 08B039)

摘　　要：Based on the deep analysis of the wide area differential principle on the separation of satellite ephemeris errors and clock errors, the similarities and differences between the absolute separation of satellite ephemeris errors under time synchronization among the differential stations and relative separation of them under no time synchronization among them are analyzed. A one-station correction method of satellite clock errors including the 1st and the 2nd step correction is given under no time synchronization among these secondary stations, and the backward inference algorithm of the second correction of satellite clock errors is proposed. Through simulation analysis, satellite time service accuracy with code phase measurement can reach 5―7 ns, and that with carrier phase smoothing pseudo-range can reach 1―3 ns.Based on the deep analysis of the wide area differential principle on the separation of satellite ephemeris errors and clock errors, the similarities and differences between the absolute separation of satellite ephemeris errors under time synchronization among the differential stations and relative separation of them under no time synchronization among them are analyzed. A one-station correction method of satellite clock errors including the 1st and the 2nd step correction is given under no time synchronization among these secondary stations, and the backward inference algorithm of the second correction of satellite clock errors is proposed. Through simulation analysis, satellite time service accuracy with code phase measurement can reach 5―7 ns, and that with carrier phase smoothing pseudo-range can reach 1―3 ns.

关 键 词：广域差分系统 卫星时钟 时钟误差 校正方法 载波相位平滑伪距 时间间隔 时间同步 星历误差 

分 类 号：P228.4[天文地球—大地测量学与测量工程] V249.3[天文地球—测绘科学与技术]