[time-nuts] MIT 2 inch cesium fountain, optically pumped

[jmfranke at cox.net]

The article says: "What time is it? The answer, no matter what your initial reference may be — a wristwatch, a smartphone, or an alarm clock — will always trace back to the atomic clock.
The international standard for time is set by atomic clocks — "

I always thought "atomic" clocks are maintained by NIST and used as the primary standard for frequency. Whereas time is maintained by USNO.

John  WA4WDL


---- "Richard (Rick) Karlquist" <richard at karlquist.com> wrote: 
> See:
> 
> http://newsoffice.mit.edu/2014/portable-atomic-clocks-1112
> 
> Any comments?
> 
> Rick Karlquist N6RK
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