GPS多接收机加权组合共视时间比对  

GPS multi-receiver weighted combined common-view time comparison

作　　者：张健 董绍武[1,3,4] 武文俊 王威雄[1,2] 郭栋 袁海波 ZHANG Jian;DONG Shao-wu;WU Wen-jun;WANG Wei-xiong;GUO Dong;YUAN Hai-bo(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 and Frequency Primary Standards,Chinese Academy of Sciences,Xi’an 710600,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 101408,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]中国科学院时间频率基准重点实验室,西安710600 [4]中国科学院大学天文与空间科学学院,北京101408

出　　处：《时间频率学报》2020年第3期175-184,共10页Journal of Time and Frequency

基　　金：国家重点研发计划资助项目(2016YFF0200203)。

摘　　要：基于全球卫星导航系统的共视时间比对技术一直是全球守时实验室参与协调世界时(UTC)计算的重要手段之一。为进一步改善共视时间比对的各项性能指标,利用中国科学院国家授时中心(NTSC)和日本情报通信研究院(NICT)两个守时实验室各自的多台接收机,基于多接收机组合技术原理,依据接收机性能,采用等权和非等权两种不同的加权方式对GPS共视接收机进行组合,构建NTSC和NICT各自的多接收机系统,进行多接收机系统共视时间比对,并对两种组合方式的比对结果进行分析。结果表明,两种组合方式均能改善共视时间比对性能,但采用非等权组合方式比对结果的标准偏差(STDEV)值为0.954 ns,优于等权组合的0.987 ns,非等权组合方式的天稳为4.6×10^-15,也优于等权组合的5.4×10^-15。Common view time comparison technology based on global navigation satellite systems has been one of the important means for global timekeeping laboratories to participate in UTC calculations.To further improve the performance indexes of the common-view time comparison,we utilize multiple receivers of the two timekeeping laboratories,the National Time Service Center of Chinese Academy of sciences(NTSC)and National Institute of Information and Communications Technology of Japan(NICT),to build up the multi-receiver system for them each,based on the technical principle of multi-receiver combination and the receiver performance while combining the GPS receivers with two different weighting methods(i.e.the equal and non-equal weight methods).We execute multi-receiver system common-view time comparison,and analyse the comparison results of the two combinations.The results show that two combinations both can improve common-view time comparison performance,but the standard deviation(STDEV)value of the comparison result using non-equal weight combination is 0.954 ns,which is superior to the equal weight combination of 0.987 ns,and the non-equal weight combination method has a stability of 4.6×10^-15 and is thus better than the equal weight combination of 5.4×10^-15.

关 键 词：时间比对 协调世界时 多接收机组合 多接收机系统 

分 类 号：P127.1[天文地球—天体测量]