一种改进的时间测量型GNSS接收机时间延迟校准方法

    An Improved Time Delay Calibration Method for GNSS Receiver Based on Time Measurement

    • 摘要: 针对高精度GNSS时间频率传递接收机时间延迟校准中参考的不稳定性,设计了一种基于多参考的实时互比及加权平均方法,抑制参考异常时变的影响,提高校准工作的时效性,保障校准结果的准确可信。选取中国计量科学研究院保持的3台GNSS时间传递接收机作为参考进行了实验验证,初步结果证实了改进方法的有效性:在一定程度上抑制单一参考随机波动引起的校准偏差;相对于传统方法,校准效率提高了约55%。

       

      Abstract: Aiming at the instability of reference in time delay calibration of high-precision GNSS time-frequency transfer receiver, a real-time cross-ratio and weighted average method based on multiple references is designed to suppress the influence of time-varying reference anomalies, improve the timeliness of calibration work and ensure the accuracy and reliability of calibration results. Three GNSS time transfer receivers maintained by the National Institute of Metrology were selected as references for experimental verification. The preliminary results confirm the effectiveness of the improved method: to a certain extent, the calibration deviation caused by random fluctuations of a single reference is suppressed; Compared with traditional methods, the calibration efficiency is increased by ~55%.

       

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