基于共视驯服的时间码同步研究

Development of Time Code Equipment Based on Common View Technology

时间码在航天、金融、电力等多个领域具有广泛的应用,基于卫星共视技术获取中心站与远端站之间的时间差,通过对铷钟进行驯服,研究了一种中心站与远端站之间长距离、高精度的时间码同步方法,进而在远端站实现高精度的授时,且可对通用时统设备进行高准确度的时间码测量,为各型号时频装备提供授时。经试验验证表明,远端站与中心站之间的时间同步标准偏差优于5 ns,远端站对外授时的1PPS准确度优于±20 ns,B(DC)准确度优于±20 ns,B(AC)准确度优于±10μs,远端站对外时间码测量偏差1PPS、B(DC)≤20 ns,B(AC)≤10μs。基于共视驯服的时间码同步,使远端站具备了覆盖不同保障需求的高精度巡检保障能力,提供了一种高精度、便捷的时频装备巡检、测试、应急保障手段。

Time codes have wide applications in various fields such as aerospace,finance,and power.Based on satellite common view technology,the time difference between the central station and the remote station is obtained.By taming the rubidium clock,a long-distance and high-precision time code synchronization method between the central station and the remote station is studied,which enables high-precision timing at the remote station and high-precision time code calibration for general time system equipment.Through experimental verification,the time synchronization standard deviation between the remote station and the central station is better than 5 ns,the accuracy of 1PPS for external timing by the remote station is better than±20 ns,the accuracy of B(DC)is better than±20 ns,and the accuracy of B(AC)is better than±10μs;Remote station external time code measurement deviation is 1PPS,B(DC)≤20 ns,B(AC)≤10μs.Based on commonview taming,time code synchronization enables remote stations to have high-precision inspection and support capabilities that cover different support requirements,providing a high-precision and convenient means of time frequency equipment inspection,testing,and emergency support.