基于软件接收机的卫星双向时间频率传递  

Two-way satellite time and frequency transfer based on software defined receiver

作　　者：武文俊[1,2,3] 姜萌 王翔 张继海[1,2] 广伟[1,2,3] 董绍武[1,2,3] WU Wen-jun;JIANG Meng;WANG Xiang;ZHANG Ji-hai;GUANG Wei;DONG Shao-wu(National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,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 101048,China)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院时间频率基准重点实验室,西安710600 [3]中国科学院大学天文与空间科学学院,北京101048

出　　处：《时间频率学报》2020年第2期94-100,共7页Journal of Time and Frequency

基　　金：国家自然科学基金资助项目(11703030,11473029)。

摘　　要：卫星双向时间频率传递是目前最准确的远距离时间比对方式之一。多年以来,卫星双向一直是利用硬件调制解调器来开展工作。在国际时间频率咨询委员会卫星双向工作组的组织下,全球主要时间实验室于2016年发起了基于软件接收机的卫星双向时间比对试验。2016年8月,中国科学院国家授时中心与德国物理技术研究院开通了第一条欧亚间基于软件接收机的卫星双向时间比对链路。通过对基于软件接收机的卫星双向时间比对进行测试与标定,结果表明:该时间比对方式的频率相对稳定度和时间稳定度分别可以达到1×10^-15/d和1 ns,其链路总不确定优于1.6 ns。最后将该链路与基于硬件调制解调器的卫星双向时间比对进行比较验证,二者结果互为一致。The two-way satellite time and frequency transfer(TWSTFT)is one of the most accurate and precise methods for remote clocks.The traditional TWSTFT is operated on hardware modem.In 2016,all the major time laboratories in the world launched the TWSTFT study based on software defined receiver(SDR)under the organization of Consultative Committee for Time and Frequency Work Group on TWSTFT(WGTWSTFT).The first Euro-Asia SDR TWSTFT link was built up between the National Time Service Center(NTSC),Chinese Academy of Sciences and Physikalisch-Technische Bundesanstalt(PTB).Test and calibration were implemented on the NTSC-PTB SDR link.It is shown that the relative frequency instability and time instability can reach to 1×10^-15(1 day)and 1 ns,respectively;its total uncertainty is less than 1.6 ns.The traditional and SDR TWSTFT links were compared with each other and it’s found that they are consistent with each other.

关 键 词：协调世界时 时间比对 卫星双向 软件接收机 

分 类 号：P127.1[天文地球—天体测量]