宇航计测技术 ›› 2023, Vol. 43 ›› Issue (1): 34-39.doi: 10.12060/j.issn.1000-7202.2023.01.07

• 量值传递技术 • 上一篇    下一篇

时间码现场校准技术研究

沈小青1，李世光2，李大珍2，王超2，王志虎1，邱斌1，余清华1，夏伟1   

  1. 1.中国卫星海上测控部，无锡 214431；2.北京无线电计量测试研究所，北京 100039
  • 出版日期:2023-02-25 发布日期:2023-04-12
  • 作者简介:沈小青（1971-），男，高级工程师，硕士，主要研究方向：无线电及时间频率计量测试技术。

Research on Field Calibration Technology of Time Code

SHEN Xiao-qing1,LI Shi-guang2,LI Da-zhen2,WANG Chao2,WANG Zhi-hu1,QIU Bin1,YU Qing-hua1,XIA Wei1   

  1. 1.China Satellite Maritime Tracking and Control Department,Wuxi 214431,China;
    2.Beijing Institute of Radio Metrology and Measurement,Beijing 100039,China
  • Online:2023-02-25 Published:2023-04-12

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摘要： 时间码在航空航天、金融、通信、交通和能源等领域应用广泛，定时偏差是表征时间码同步性能的重要参数。而时间码设备使用环境复杂，需长期连续加电运行，不宜拆卸。因此，需要采用现场校准技术。利用北斗共视技术，研究一种时间码现场校准方法，可远程获得精确可靠的时间参考，对常见时间码如1PPS、B(DC)码和B(AC)码等进行测量，解决时间码现场校准的难题。实验结果表明，基于该方法的现场校准装置内时基相对于UTC（BIRM）的定时偏差优于10 ns，1PPS和B(DC)测量的扩展不确定度小于20 ns，B(AC)测量的扩展不确定度小于1.5 μs。

关键词: 时间码, 现场校准, 北斗共视, 测量不确定度

Abstract: Time code is widely used in aerospace,finance,communication,transportation and energy,etc while timing deviation is an important parameter to characterize the synchronization performance of time code.The operation environment of time code equipment is complex where it needs to be continuously powered up for a long time,so it is not suitable for disassembly.Therefore,field calibration technology should be adopted for timing deviation measurement.In this paper,a field calibration method of time code is proposed,which utilizes Beidou common view technology to obtain accurate and reliable time reference.Time codes such as 1PPS,B(DC）code and B(AC）code can be measured so as to solve the problem of field calibration.The experimental results show that the timing deviation of the time base in the field calibration device is less than 10ns relative to UTC(BIRM).The expanded uncertainty of 1PPS and B(DC）measurement is less than 20 ns,and the expanded uncertainty of B(AC）measurement is less than 1.5 μs.

Key words: Time code, Field calibration, Beidou common view, Uncertainty of measurement

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