1. Shanghai Aerospace Electronic Technology Institute, Shanghai 201109, China
2. Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China
Abstract：In view of the high precision positioning requirements of the new generation of satellite navigation system of china, the onboard hydrogen maser has been widely used in the system as a frequency reference because of its excellent long-term stability, drift rate and temperature characteristics. The passive onboard hydrogen maser with dual-frequency scheme consists of physical part and circuit part. The microwave excitation signal excites the microwave cavity of the physical part and generates the error signal of cavity frequency and the error signal of high stability crystal oscillator. For how to extract and process these two kinds of error signal, one separation scheme of amplitude modulation signal by the same time sequence synchronization of error signal and detection signal is proppsed. At the same time, the crystal oscillator error signals are sampled and maintained to realize the downloading of the telemetry parameters of hydrogen maser's locking.
赵广东,陈鹏飞,刘杰,黄奕,李思衡. 一种基于星载氢钟误差信号提取的实现方法[J]. 计量学报, 2021, 42(2): 239-244.
ZHAO Guang-dong,CHEN Peng-fei,LIU Jie,HUANG Yi,LI Si-heng. One Method of the Extraction of the Error Signal Based on the Onboard Hydrogen Maser. Acta Metrologica Sinica, 2021, 42(2): 239-244.
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2021, Vol. 42 
