The media is reporting a large solar storm and saying it will upset GPS
among other things.
Has anybody see any effects?
-John
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On 3/8/2012 10:08 AM, J. Forster wrote:
The media is reporting a large solar storm and saying it will upset GPS
among other things.
Has anybody see any effects?
I won't be able to look at the data until I get home from work tonight,
but last evening I started measuring the sawtooth-corrected
From the look of it to me it is a non-event it looks like it bounced off and
didnt reconnect. there is little increase in the ring current i.e. the charge
in the van Allen belt according to the Dst index 1500z today..yesterdays
event was bigger from that point of view
Alan G3NYK
--- On
My Spectracom 8170 WWVB receiver hasn't locked up since yesterday sometime. It
was a bit flakey before, but at least one other WWVB clock in the house is also
struggling (the others don't give a clear indication), so I'm thinking of
blaming the solar flare. Does this affect LF especially?
Hi
If they are backing up GPS for telcom, then CDMA timing is the most likely
target. That gets them to 10 us max and 1 us typical. Of course somebody
would have to buy the gear to actually *use* it to do any good... (yes I
could and have gone on and on about that topic).
Bob
-Original
There are three things going on with WWVB right now
1. They are testing a new data format:
http://www.nist.gov/pml/div688/grp40/wwvb.cfm
2. They had an outage for about an hour earlier today:
http://www.nist.gov/pml/div688/grp40/wwvb-station-outages.cfm
3. There are reception failures at
In Boston, WWVB is often very noisy. When I compared the received signal
to a local standard, some days it'd be rock solid. Other days it's a dog's
breakfast.
In fact, it would change dramatically around a weather front passage too.
I'd think so.
-John
=
My Spectracom 8170
On 2012/03/08 11:17, Brent Gordon wrote:
There are three things going on with WWVB right now
1. They are testing a new data format:
http://www.nist.gov/pml/div688/grp40/wwvb.cfm
2. They had an outage for about an hour earlier today:
http://www.nist.gov/pml/div688/grp40/wwvb-station-outages.cfm
In message d20d95b53d5c40f5aca05df98fdb9...@vectron.com, Bob Camp writes:
If they are backing up GPS for telcom, then CDMA timing is the most likely
target. That gets them to 10 us max and 1 us typical. Of course somebody
would have to buy the gear to actually *use* it to do any good... (yes I
Hi
Should be *very* interesting to watch if they try to legislate something
like that...
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Poul-Henning Kamp
Sent: Thursday, March 08, 2012 5:10 PM
To: Discussion of precise time and
On 03/08/2012 11:21 PM, Bob Camp wrote:
Hi
Should be *very* interesting to watch if they try to legislate something
like that...
Indeed.
There are different telecom needs. CDMA isn't everything.
SDH/SONET goes under G.811, meaning within 1E-11 in frequency.
GSM should be within +/- 50 ppb,
Hi
SDH/SONET generally is line timed rather than GPS locked. It's ultimate
authority is the Stratum 1 above it... With CDMA framing, GPS time is actually
the ultimate authority. With GSM (as with the CDMA carrier frequency) a free
running oscillator is generally good enough.
Bob
On Mar 8,
On 03/09/2012 12:16 AM, Bob Camp wrote:
Hi
SDH/SONET generally is line timed rather than GPS locked. It's ultimate
authority is the Stratum 1 above it...
Yes, but GPS/LORAN can be used to build holdover synchronisation, and
verify the local cesiums.
Stratum 1 is the ANSI T1.101 name, also
Hi
Indeed, you *can* use GPS for a lot of things. You pretty much *must* use it
for CDMA.
Bob
On Mar 8, 2012, at 6:36 PM, Magnus Danielson mag...@rubidium.dyndns.org wrote:
On 03/09/2012 12:16 AM, Bob Camp wrote:
Hi
SDH/SONET generally is line timed rather than GPS locked. It's
On 8 Mar, 2012, at 02:58 , Poul-Henning Kamp wrote:
Has anybody asked them how good timefreq they're trying to deliver ?
I would assume that they are aiming for a backup for GPS in
telecom-GPSDO context.
If so, frequency stability is priority number one and time is
probably just better
Over last day and a half I've been comparing the 10Mhz output of my Jupiter
based GPSDO (actually a G3RUH GPSDO) to a BVA OCXO. So far I don't see
anything un expected. That being said I recognize that it would take a fairly
significant disruption in the GPS signal for the affects to be
I noticed this which could potentially be a very good thing.
https://newsroom.unsw.edu.au/news/science/nuclear-clock-may-keep-time-universe
Apologies for the long period watching on the sidelines but I have been
learning a lot.
Regards,
Roger
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