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

Mon, 5 Aug 2002 18:53:15 -0500

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Mike>WE0H
http://www.we0h.us/lf.html

-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of Michael Silvers
Sent: Monday, August 05, 2002 6:44 PM
To: [email protected]
Subject: Re: [Lowfer] "WE" in QRSS-60 now and freq measurements...

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 <[email protected]> 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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