时间频率传递GPS接收机内延迟差分校准技术研究

在BIPM差分校准方法基础上,实现了改进的可对时间频率传递GPS接收机内延迟进行单独校准的差分校准方法。以一台经过内延迟校准的接收机作为参考,利用改进的差分校准方法,对另一台基于Javad E_GGD GPS接收模块的自主研制的时间频率传递GPS接收机进行了内延迟校准,校准不确定度优于6ns,与绝对校准方法符合度优于1ns。

Study on the Differential Calibration Techniques for the Internal Time Delays of the GPS Receivers for Time and Frequency Transfer

On the basis of BIPM differential calibration method, the modified calibration method that can be used to calibrate the receiver internal delay independently has been implemented. The calibration of one such receiver was carried out, a self-developed time transfer receiver, based on a Javad E_GGD GPS module, by the improved differential calibration method with respect to another time transfer receiver that had previously been calibrated, and a total calibration uncertainty of less than 6 nanosecond level can be acquired. The results of the differential calibration agree well with the ones of the absolute calibration formerly within 1ns.