NIST-7

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NIST-7 was the atomic clock used by the United States from 1993 to 1999. The cesium beam clock served as the nation's primary time and frequency standard during that time period, but it has since been replaced with the more accurate NIST-F1, a cesium fountain atomic clock that neither gains nor loses one second in 60 million years.

[edit] External links, references

• National Institute of Standards and Technology - [1]

Retrieved from "http://en.wikipedia.org../../../n/i/s/NIST-7_d364.html"

Categories: Clocks | National Institute of Standards and Technology

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• This page was last modified 16:37, 25 November 2006 by Anonymous user(s) of Wikipedia. Based on work by Wikipedia user(s) Tregoweth, Model Citizen and High Plains Drifter.
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