[time-nuts] New WWVB format...

[Tom Miller]

See:

http://www.nist.gov/calibrations/upload/1424.pdf

Re. GPS traceable to NIST.


----- Original Message ----- 
From: "Burt I. Weiner" <biwa at att.net>
To: <time-nuts at febo.com>
Sent: Wednesday, September 26, 2012 11:49 AM
Subject: [time-nuts] New WWVB format...


I'm sure most of this group has seen the information put out by NIST
regarding the changes to the WWVB format.  But, for those who may not
yet have seen this, here's a link to it:

http://f1.grp.yahoofs.com/v1/cBhjUH41xVccWM9P8EU4JqzmFNevFgDUFkRcgfLyry1Rn3HqMV5iDqYDgsd2pM1-Vq3nhF9WERTjVF_WmRjAezjU9CCrAda_8RqV/NIST-Enhanced-WWVB-Broadcast-Format.pdf

The results of this change will apparently no longer allow WWVB to be
used as a high accuracy frequency standard signal.  This does not
seem to be much of an issue considering the availability of the GPS
signals all over the world.

I use GPS as my frequency reference for my "Off-Air" broadcast
frequency measurement service.  Some broadcast stations also use GPS
as a reference for their transmitters.  I'm sometimes asked why I use
GPS as a reference when it is not recognized by NIST as the U.S.
Frequency Standard?  Other than explaining the capabilities of GPS as
a reference, I don't have a real answer for their specific
question.  I have publications from NIST showing the accuracies
obtainable using GPS, but it still does not appear to be an
"Official" U.S. Frequency Standard.  So, I guess my question is, when
will NIST officially recognize GPS as, at least an alternate, U.S.
Frequency Standard?  Have I missed something?

Thanks,

Burt, K6OQK

Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California  U.S.A.
biwa at att.net
www.biwa.cc
K6OQK


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