实时UTC(NTSC)的监控软件

摘要

国际电信联盟建议,作为国家时间中心的实时UTC(k)与协调世界时UTC的差异应不大于100ns.从2000年12月起,中国科学院国家授时中心(NTSC)产生和保持的UTC(NTSC)的准确度通过人工监控已达到了这个指标.UTC(NTSC)主要以其所拥有的一组6个HP5071A铯原子钟产生的地方原子时TA(NTSC)为参考,用相位微调仪调控UTC(NTSC)的频率,使它达到所需的准确度.介绍了在VB6.0环境下开发的一个UTC(NTSC)的自动监控软件,它包括4个窗体和由与4个窗体上的控件及图形窗口相匹配的子程序组成.图形窗口可以实时显示钟的日差曲线、UTC(NTSC)-TA(NTSC)曲线和UTC(NTSC)-GPS曲线.该软件自动化可视化程度高、灵活性强,即可实时自动运行,又可人机对话操作.该软件的主体部分已于2001年底完成,在2002年成功地进行了部分程序的试运行,使[(UTC-UTC(NTSC)]达到了优于50ns的准确度水平.%ITU recommended[1] the requirement, in real time,[ IUTC-UTC(k) ] ≤100 ns,UTC(NTSC) is generated and kept by the National Time Service Center (NTSC),the Chinese Academy of Sciences and [UTC- UTC(NTSC)] has been kept withinthe required accuracy since Dec. 2000. UTC (NTSC, MC) is steered mainly withreference to the local atomic time scale of TA(NTSC) which is the time scale beingcomposed of the 6 atomic clocks of the type HP 5071 A at NTSC. The software forreal time monitoring and controlling of UTC(NTSC) has been developed and is beingunder testing , which consists of four frames with the environment of Visual Basic6.0. The curves fowmed, in real time, with the data of UTC(NTSC) -GPS obtainedfrom the output files of R100/30T GPS/GLONASS time receivers are used as asubordinated reference.