[time-nuts] WWVB Outages?
gbusg at comcast.net
Fri Dec 26 20:18:41 UTC 2008
Thanks for the link, Tom. That's the same link that Michael Lombardi gave me
a number of years ago. The issues I have with that NIST data is that, 1),
it's not updated in realtime, e.g., I can't see today's events; and, 2), it
only records outages lasting 5 minutes or longer. In the past few years,
I've experienced numerous other outages (lasting less than 5 minutes), that
weren't reported at NIST's "Broadcast Outages" site.
One problem with lack of "realtime" data (including events lasting less than
5 minutes) from NIST is that it tends to cause customers to waste time,
troubleshooting their equipment and processes, in case the problem might be
at their side instead of NIST's.
Today's outage lasted more than 5 minutes. So it will be interesting to see
if it's eventually included in NIST's "Broadcast Outages" list.
----- Original Message -----
From: "Tom Van Baak" <tvb at LeapSecond.com>
To: "Discussion of precise time and frequency measurement"
<time-nuts at febo.com>
Sent: Friday, December 26, 2008 1:06 PM
Subject: Re: [time-nuts] WWVB Outages?
It happens now and then; no big deal. NIST is very good about
logging these events for us. For recent (and past 7 years) see:
> Have any of you noticed intermittent WWVB outages lately?
> I've been having that problem, every once in a while, the past month or
> more. For example, here in Colorado Springs, the 60 kHz signal disappeared
> sometime this morning before 11:42AM MST, and returned at 12:28PM MST.
> this happens it kills my routine plot of my GPS-disciplined house standard
> against WWVB (that I use for in-house cross-checking / confidence
> I'm using a Kinemetrics Model 60TF WWVB Frequency Comparator / Receiver,
> that requires a continuous WWVB signal. (This is unlike the consumer
> Clocks" that the public use; those kinds of WWVB-locked clocks do *not*
> require a continuous on-air signal, but rather "flywheel" in between
> scheduled locks a few times per day, as I understand it?)
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