多基准终端星站钟差融合方法对比分析  

Comparative analysis of satellite station clock difference fusion methods for multi-reference terminals

作　　者：付欣 陈瑞琼[1] 刘娅[1,2,3] 李孝辉 曾迎春[4] 朱敏 FU Xin;CHEN Rui-qiong;LIU Ya;LI Xiao-hui;ZENG Ying-chun;ZHU Min(National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Time Reference and Applications,Chinese Academy of Sciences,Xi’an 710600,China;Chengdu Kingnotion High-Technology Company Limited,Chengdu 610097,China)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院大学,北京100049 [3]时间基准及应用重点实验室(中国科学院),西安710600 [4]成都金诺信高科技有限公司,成都610097

出　　处：《时间频率学报》2024年第2期104-109,共6页Journal of Time and Frequency

基　　金：国家自然科学基金青年项目(12003040);中国科学院“西部之光”西部交叉团队重点实验室专项(xbzg-zdsys-202120)。

摘　　要：随着科技的发展,国民经济、国防建设等行业对高精度时间的要求越来越高。目前通过标准时间复现系统可以实现2 ns以内的授时精度,但是仍然不能满足一些高精度时间频率用户的需求。当前使用的单一基准站在实际观测中会产生随机误差从而影响复现结果,为了将随机误差降到最小,提出了4种基于多基准终端的钟差数据融合方法,用于提高系统中标准时间的复现精度。通过对这4种方法进行分析研究,发现通过将各个基准终端GPS(global positioning system)和BDS(Beidou navigation satellite system)的星站钟差数据分开进行3σ剔除粗差后,再进行加权平均的方法,复现效果最优,可以有效解决只用单一基准终端数据所造成的复现精度低的问题,通过测试分析,相较使用单一基准终端,使用多基准终端的复现精度可由2 ns提升至0.35 ns。With the development of science and technology,the national economy,national defense construction and other industries have increasingly high requirements for high-precision time.At present,the time service accuracy within 2 ns can be achieved through the standard time reproduction system,but still cannot meet the needs of some high-precision time frequency users.To minimize the random error,four clock error data fusion methods based on multiple reference terminals are proposed to improve the accuracy of the standard time in the system.Through the analysis and research of these four methods,it is found that the method of eliminating the gross error of GPS and BDS clock difference data of each reference terminal separately and then carrying out weighted average has the best reproduction effect,which can effectively solve the problem of low reproduction accuracy caused by using only a single reference terminal data.Through the test and analysis,compared with using a single reference terminal,the reproduction accuracy of using multiple reference terminals can be improved from 2 to 0.35 ns.

关 键 词：时间频率 时间复现 星站钟差 数据融合 

分 类 号：P228.4[天文地球—大地测量学与测量工程] P127.1[天文地球—测绘科学与技术]