基于卫星授时监测数据改善定时及定位方法研究  

Research on Method for Improving Timing and Positioning Service Based on Satellite Timing Monitoring Data

作　　者：聂骊颖 许龙霞[1,2,3] 李孝辉 NIE Liying;XU Longxia;LI Xiaohui(National Time Service Center,CAS,3 East-Shuyuan Road,Xi’an 710600,China;University of Chinese Academy of Sciences,A19 Yuquan Road,Beijing 100049,China;Key Laboratory of Time Reference and Applications,CAS,3 East-Shuyuan Road,Xi’an 710600,China)

机构地区：[1]中国科学院国家授时中心,西安市710600 [2]中国科学院大学,北京市100049 [3]中国科学院时间基准及应用重点实验室,西安市710600

出　　处：《大地测量与地球动力学》2025年第1期36-40,共5页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(12073033);中国科学院“西部之光”人才培养计划(XAB2020YN07)。

摘　　要：为使卫星授时监测数据更好地服务于用户,研究使用其削弱标准单点定位中卫星端和传输路径误差的影响,改善用户端定时稳定度与定位精度;同时将用户相对于卫星导航系统时间的定时偏差改正到相对于国家标准时间。以GPS为例开展实验验证,短基线实验结果表明,定时方面,L1频段定时偏差的均值从-42.8 ns改善到5.4 ns,L2频段从-53.6 ns改善到2.8 ns;定位方面,L1频段X、Y、Z三个方向定位误差的均值改善55%以上,L2频段改善77%以上。证明使用卫星授时监测数据,卫星导航系统用户不仅可以将伪码定位精度提高至亚m级,还可以获得相对于国家标准时间的偏差,实现国家标准时间的ns级授时。By utilizing satellite time-monitoring data to mitigate the impact of satellite-side and transmission path errors in standard single-point positioning,the timing stability and positioning accuracy at the user end are improved.At the same time,the timing deviation of the user relative to the satellite navigation system is corrected to be relative to the national standard time.Taking GPS as an example for a short baseline experiment,the results show that in terms of timing,the mean timing deviation of the L1 frequency band was improved from-42.8 ns to 5.4 ns,and from-53.6 ns to 2.8 ns for the L2 frequency band;in terms of positioning,the mean positioning errors in the X,Y,and Z directions for the L1 frequency band were improved by more than 55%,and by more than 77%for the L2 frequency band.This proves that by using satellite time-monitoring data,users of the satellite navigation system can not only enhance the pseudo-code positioning accuracy to the sub-meter level but also obtain the deviation relative to the national standard time,achieving ns-level timekeeping of the national standard time.

关 键 词：授时监测 授时偏差 伪码 定时 定位 

分 类 号：P228[天文地球—大地测量学与测量工程]