一种基于星载氢钟误差信号提取的实现方法  

One Method of the Extraction of the Error Signal Based on the Onboard Hydrogen Maser

作　　者：赵广东 陈鹏飞[2] 刘杰 黄奕 李思衡 ZHAO Guang-dong;CHEN Peng-fei;LIU Jie;HUANG Yi;LI Si-heng(Shanghai Aerospace Electronic Technology Institute,Shanghai 201109,China;Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China)

机构地区：[1]上海航天电子技术研究所,上海201109 [2]中国科学院上海天文台,上海200030

出　　处：《计量学报》2021年第2期239-244,共6页Acta Metrologica Sinica

摘　　要：针对中国新一代卫星导航系统的高精度定位要求,星载氢原子钟以极其优异的长期稳定性、漂移率以及温度特性,作为频率基准大规模应用于该系统。双频方案的被动型星载氢原子钟由物理部分及电路部分两大部分组成,微波激励信号对物理部分微波腔激励后产生了腔频误差信号及高稳晶振误差信号。对于如何提取并处理这两种误差信号,提出了一种对调幅信号包络检波并以误差信号与探测信号时序同步的分离方案,同时对晶振误差信号采样保持实现氢钟锁定遥测参数下传。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.

关 键 词：计量学 氢原子钟 导航卫星 误差信号 调幅信号 

分 类 号：TB939[一般工业技术—计量学]