[Lowfer] "WE" in QRSS-60 now and freq measurements...

[Jay Rusgrove]

Mike

Thanks for the info! Cool, very cool. Well done website, too.

Jay Rusgrove, W1VD

Michael Silvers wrote:

> Hi,
>
> See right side of http://www.bldrdoc.gov/timefreq/
>
> Also, see
> http://www.bldrdoc.gov/timefreq/cesium/fountain.htm
> "The uncertainty of NIST-F1 is less than 2 x 10-15,
> which means it would neither gain nor lose a second in
> 20 million years! "  Operative word there is "less
> than", so also see bottom of
> http://www.bldrdoc.gov/timefreq/cesium/atomichistory.htm
> where it states "1999 -- NIST-F1 begins operation with
> an uncertainty of 1.7 x 10-15, or accuracy to about
> one second in 20 million years, making it one of the
> most accurate clocks ever made"
>
> 73 de Mike KB6WFC k ..
>
> --- Ed Phillips <evp@pacbell.net> wrote:
> > Jay Rusgrove wrote:
> > >
> > > Ed
> > >
> > > I seem to recall 1 X 10 ^-15. Does that agree with
> > what you saw?
> > >
> > > Jay Rusgrove, W1VD
> > >
> > > Ed Phillips wrote:
> >
> >       That's in low hydrogen maser territority, and I
> > thought it was better
> > than that, perhaps 1 x 10^-17.  I will be talking to
> > someone Thursday
> > who probably will remember, as he's a mathematical
> > physicist (I'm just a
> > poor dumb EE) and followed the principles of
> > operation better than I do.
> >
> > Ed
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