cesium atomic fountain clock 铯原子喷泉钟
This paper introduces the frequency deviations of NIM4 Cesium fountain clock , the method and result of a new evaluation.
详细介绍NIM4铯喷泉钟系统频移及其不确定度的最新评定方法和结果。
Official civilian time is kept by the cesium NIST-F1 fountain clock, accurate to within one second every 100 million years.
官方民用时间是由NIST - F 1铯原子钟记录，其准确度在每1亿年一秒的范围内。
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