[time-nuts] improved WWVB signal being planned?

[paul swed]

Hard to say if anything will happen. Read the article and it appears nist
actually had the money to revamp one of the old LORAN C or other
transmitting facilities on the East Coast to setup on a new frequency a WWVB
like station. They couldn't figure out what to do so had to return the
money. Not sure what I can say to that. At least not on this thread. Hmmm
Concerns down in Washington on rf effects blah blah blah. Nantucket seems to
be way out of the way last I heard it was idle.
Oh well not much more to be said in that respect.
Regards
Paul


On Mon, Mar 28, 2011 at 10:14 PM, tcxo <gbusg at comcast.net> wrote:

> I'm concerned that, in their quest to address the needs of the general
> public's radio clocks, NIST might overlook the frequency standards needs of
> our metrology community. (Unless the metrology community provides adequate
> feedback to NIST *before* it might be too late?)
>
> According to their interpretations of ISO/IEC 17025, many customers require
> metrology labs to include inter-comparison procedures for assurance. For
> example, they might require a GPS disciplined house frequency standard to
> be
> cross-checked against another non-GPS frequency standard (for assurance
> purposes). In the past Loran-C served this need well as the alternate
> source
> of traceable frequency. But with the demise of Loran-C, WWVB has become
> more
> important for this purpose. Yes, we know that GPS out-performs WWVB for
> frequency; but within a stated uncertainty (that's adequate for many
> purposes), WWVB still supplies the alternate source of traceable frequency
> comparison.
>
> Do any of the resident gurus of this list have opinions as to whether or
> not
> NIST's proposals might exclude WWVB as a source of traceable frequency
> comparisons?
>
> At least, I think it prudent that some of us let NIST know that we're still
> relying on WWVB for traceable frequency comparison systems.
>
> Greg
>
>
> ----- Original Message -----
> From: "beale" <beale at bealecorner.com>
> To: <time-nuts at febo.com>
> Sent: Monday, March 28, 2011 3:02 PM
> Subject: [time-nuts] improved WWVB signal being planned?
>
>
> I thought this was interesting... I don't know if this had been already
> mentioned here- probably some list members are already part of the process!
> I wonder if this would be a spread-spectrum code like the GPS signal?
>
> "[...] Another idea being actively investigated is to add phase modulation
> to the existing WWVB signal while leaving the AM BCD code intact. This
> would
> allow all existing devices to continue to work, but allow a new generation
> of radio-controlled clocks to be developed.  These new devices would have
> greater processing gain and therefore be capable of reading the time code
> with a lower signal-to-noise ratio."
>
> from  "We Help Move Time Through the Air
> Managers of WWVB Explore Options to Improve the Service Further"
> by John Lowe, manager of NIST radio stations WWV/WWVH/WWVB.
> http://tf.boulder.nist.gov/general/pdf/2504.pdf
>
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