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个窗体上的控作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 the requirement,in real time, |UTC -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 within the required accuracy since Dec. 2000. UTC ( NTSC, MC) is steered mainly with reference to the local atomic time scale of TA(NTSC) which is the time scale being composed of the 6 atomic clocks of the type HP 5071 A at NTSC. The software for real time monitoring and controlling of UTC(NTSC) has been developed and is being under testing , which consists of four frames with the environment of Visual Basic 6.0. The curves formed,in real time, with the data of UTC(NTSC) - GPS obtained from the output files of R100/30T GPS/GLONASS time receivers are used as a subordinated reference.
出处
《陕西天文台台刊》
CSCD
2002年第2期101-109,共9页
Publications of The Shaanxi Astronomical Observatiory
基金
国家自然科学基金(批准号60272067)
