一种时间比对设备零值的校准方法

A Calibration Method Based on Time Transfer Equipment Zero Value

共视时间比对是一种广泛使用的远距离高精度时间比对方法,针对共视时间比对设备零值校准的需求,提出了设备零值的绝对标定方法,将设备绝对零值分解为线缆零值、主机零值和天线零值等,通过矢量网络分析仪、模拟源和微波暗箱等进行分段标定,标定步骤简单,校准设备可搬移,能够适用于设备安装后的现场校准。对未知零值的共视时间比对设备进行了标定试验,试验结果表明,能够达到优于0.3 ns的校准精度,满足工程应用要求。

Common view time transfer has been widely used for the applications with long range and high precision.In order to calibrate the common view time transfer equipment zero value,the equipment calibration method is proposed.The absolutely zero value is decomposed into cable zero value,host zero value,antenna zero value,etc.The vector network analyzer,signal simulator,microwave chamber is used to calibrate zero value separately.The calibration procedure is simple and the calibration equipment is easy to move,which can be able to use in on-site test.The zero value calibration is carried out by using the common view time transfer equipment with unknown zero value.The test result shows that the calibration accuracy is better than 0.3 ns,and is able to meet the requirements of engineering application.