期刊 一种基于GNSS卫星共视的标准时间复现终端研制  

Development of a standard time recurring terminal based on GNSS satellite common-view

作  者:陈瑞琼[1,3] 卢建福 刘娅[1,3] 李孝辉[1,3] 

Chen Ruiqiong;Lu Jianfu;Liu Ya;Li Xiaohui(National Time Service Center,Chinese Academy of Sciences,Xi′an 710600,China;The 34th Research Institute of China Electronics Technology Group Corporation,Guilin 541000,China;Graduate University of Chinese Academy of Sciences,Beijing 100190,China)

机构地区:[1]中国科学院国家授时中心,西安710600 [2]中国电子科技集团公司第三十四研究所,桂林541000 [3]中国科学院研究生院,北京100190

出  处:《电子测量技术》2021年第6期143-148,共6页Electronic Measurement Technology

Development of a standard time recurring terminal based on GNSS satellite common-view

基  金:国家自然科学基金(12003040)项目资助。

摘  要:研制了一种基于GNSS卫星共视的标准时间复现终端,终端所用技术对传统卫星共视进行了改进,使其共视周期根据用户所使用的时钟源类型不同可进行灵活配置,不局限于传统共视的16 min。另外,利用该技术搭建了一套远程复现系统,系统由基准站与用户站组成,两地均放置一台标准时间复现终端,终端主要由卫星卡、时间间隔计数器、时钟源组成,具备体积小、成本低、组成灵活等特点。通过利用基准站与用户站的共视比对结果,调整用户站的时钟源输出信号,最终可在用户本地实时复现出与基准站同步的时间频率信号,同步的绝对偏差可保持在10 ns以内(95%)。对于用户来说,不需要深入了解其中的实现原理,只需要一台复现终端,就可以得到与基准站时间高精度同步的时间频率信号,从而满足了各行各业用户对时频信号的需求。根据测试试验,得出双频版复现终端异地恢复的时频信号与国家标准时间UTC(NTSC)频率信号偏差最大为7.19 ns,标准差为1.49 ns,频率准确度为4.25×10-14;单频版复现终端异地恢复的时频信号与国家标准时间UTC(NTSC)频率信号偏差最大为10.9 ns,标准差为4.23 ns,频率准确度为3.79×10-14。

Develops a standard time reproduction terminal based on GNSS satellite common-view. The technology used by the terminal has improved the traditional satellite common-view, so that the common-view period can be flexibly configured according to the type of clock source used by the users, and is not limited 16 minutes in the traditional common view.In addition, a set of remote reproduction system is built using this technology. The system is composed of a reference station and a user station. A standard time reproduction terminal is placed in both places. The terminal is mainly composed of a satellite card, a time interval counter, and a clock source. Features such as small size, low cost and flexible composition. By using the common view comparison result of the base station and the user station to adjust the clock source output signal of the user station, the time and frequency signal synchronized with the base station can be reproduced locally in the user in real time, and the absolute deviation of synchronization can be kept within 10 ns(95%). For users, there is no need to deeply understand the implementation principle, only a reproduction terminal is needed to obtain a time-frequency signal synchronized with the time of the reference station with high precision, thus meeting the needs of users in all walks of life for time-frequency signals. According to the test experiment, it is concluded that the time-frequency signal of the dual-frequency version of the reproduction terminal has a maximum deviation of 7.19 ns from the national standard time UTC(NTSC) frequency signal, the standard deviation is 1.49 ns, and the frequency accuracy is 4.25×10-14. The maximum deviation between the time-frequency signal recovered in the remote location of the single-frequency version of the terminal and the national standard time UTC(NTSC) frequency signal is 10.9 ns, the standard deviation is 4.23 ns, and the frequency accuracy is 3.79×10-14.

关 键 词:时钟监测 共视 时间频率 远距离 复现 

clock monitoring common-view time-frequency remote reproduction 

分 类 号:TH76[机械工程—仪器科学与技术] TP873[机械工程—精密仪器及机械]

 

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