[Boatanchors] SI units and the rest

[J. Forster]

It's an accurate statement. A Cs is better than a quartz crystal and a Rb,
but not as good as H MASER nor any of the optical standards (by 4 to 8
orders of magnitude).

-John

===========


>
> On Nov 16, 2010, at 4:51 PM, J. Forster pronounces:
>
>> The length of a second is arbitrary, and the number of Cs cycles is an
>> approximation to the traditional value. It is fairly stable. Nothing
>> more.
>
> "fairly stable."  Am sure NBS and others will be relieved to know
> that.......
>
> DD
>
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