施闯, 郑福, 楼益栋, 王玉琢, 张爱敏, 张首刚, 张东, 宋伟, 王梦, 林元挥, 王浩源. 北斗高精度时频服务理论方法与应用[J]. 武汉大学学报 ( 信息科学版), 2023, 48(7): 1010-1018. DOI: 10.13203/j.whugis20230205
引用本文: 施闯, 郑福, 楼益栋, 王玉琢, 张爱敏, 张首刚, 张东, 宋伟, 王梦, 林元挥, 王浩源. 北斗高精度时频服务理论方法与应用[J]. 武汉大学学报 ( 信息科学版), 2023, 48(7): 1010-1018. DOI: 10.13203/j.whugis20230205
SHI Chuang, ZHENG Fu, LOU Yidong, WANG Yuzhuo, ZHANG Aimin, ZHANG Shougang, ZHANG Dong, SONG Wei, WANG Meng, LIN Yuanhui, WANG Haoyuan. BDS High-Precision Time and Frequency Service Theorical Method and Application[J]. Geomatics and Information Science of Wuhan University, 2023, 48(7): 1010-1018. DOI: 10.13203/j.whugis20230205
Citation: SHI Chuang, ZHENG Fu, LOU Yidong, WANG Yuzhuo, ZHANG Aimin, ZHANG Shougang, ZHANG Dong, SONG Wei, WANG Meng, LIN Yuanhui, WANG Haoyuan. BDS High-Precision Time and Frequency Service Theorical Method and Application[J]. Geomatics and Information Science of Wuhan University, 2023, 48(7): 1010-1018. DOI: 10.13203/j.whugis20230205

北斗高精度时频服务理论方法与应用

BDS High-Precision Time and Frequency Service Theorical Method and Application

  • 摘要: 在广域高精度时间服务(wide-area precise timing,WPT)原型系统的基础上,提出了北斗高精度时频传递理论方法,进一步扩展了北斗高精度时频服务,包括时频基准溯源、时钟实时比对、授时终端性能在线监测,相关服务对于北斗精密单点授时、实时时间比对、授时终端的可靠性具有重要意义。对北斗高精度授时终端在短基线、中长基线以及长基线链路上的授时性能进行了评估,结果表明,WPT服务系统可提供优于100 ps和1×10-15量级的时间和频率服务。在此基础上,对北斗高精度时频服务在时频终端在线计量、低轨星座时间同步、时频测试分析3个方面展开了应用研究。

     

    Abstract:
      Objectives  Under the background of the nanosecond or even sub-nanosecond requirements for timing accuracy proposed by the new generation of communication technology, precise measurement and control as well as military weapon platforms, the wide-area precise timing (WPT) system based on BeiDou satellite navigation system (BDS) is built with sub-nanosecond time service capability.
      Methods  Based on the WPT prototype system, we further extend the BDS high-precision time-frequency service, including time reference traceability, real-time clock comparison and online monitoring of timing terminal performance, which are of great significance for high-precision timing, real-time comparison and the reliability of timing terminals. The timing performance of BDS high-precision timing terminals in short baseline, medium-length baseline and long baseline is evaluated.
      Results  The results show that: (1) The accuracy of GPS timing based on WPT service system accuracy is better than 0.1 ns, while the accuracy of BDS-3 is 0.15 ns. The frequency stability of timing results after traceability can reach 1×10-15 at ten thousand averaging. (2) The performance of real-time comparison for BRUX-SPT0 link based on WPT is better than 0.1 ns. (3) The difference between the terminal time and the system time is less than 1 ns. (4) The accuracy of real-time time synchronization for short and medium baseline is within 0.1 ns. The frequency stability can reach 1×10-15 level at ten thousand averaging. (5) The accuracy of real-time time synchronization using BeiDou high precision timing terminal for long baseline is better than 1 ns.
      Conclusions  The WPT service system can provide time and frequency services of better than 100 picoseconds and 1×10-15 magnitude. On this basis, we investigate three application research on BDS high-precision time-frequency services, online metrology of time-frequency terminals, time synchronization of low-orbit constellations and time-frequency test analysis, which are of great significance for BDS innovative applications in the time-frequency field.

     

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