Rather than messing with WWVB, some LORAN-C should be put back on the air.
It is essentially impossible to jam, unlike GPS or WWVB.
I could easily see it with a small (1') loop and a 'scope.
YMMV,
-John
==
Perry you mean like the 10' X 10' loop I put up?
It has about 800
On 07/15/2012 11:48 AM, J. Forster wrote:
Rather than messing with WWVB, some LORAN-C should be put back on the air.
It is essentially impossible to jam, unlike GPS or WWVB.
A first place to look to check out that claim would be:
Notice I said 'some'. One station would suffice. I'm only interested in a
standard of time interval.
-John
=
On 07/15/2012 11:48 AM, J. Forster wrote:
Rather than messing with WWVB, some LORAN-C should be put back on the
air.
It is essentially impossible to jam, unlike GPS
On 07/15/2012 12:49 PM, J. Forster wrote:
Notice I said 'some'. One station would suffice. I'm only interested in a
standard of time interval.
That may not be sufficient for other uses, such as navigation. Firing
one up for frequency source only would probably not be motivated.
Cheers,
Hi
The *only* way for redundancy to do any good is for it to be designed into
systems. That simply is not done. It was not done back when everything was on
the air. It's not going to be done now (can't) or in the future (prediction).
Why? It costs money, it did cost money, it will cost money.
On Sun, Jul 15, 2012 at 2:48 AM, J. Forster j...@quikus.com wrote:
Rather than messing with WWVB, some LORAN-C should be put back on the air.
It is essentially impossible to jam, unlike GPS or WWVB.
I could easily see it with a small (1') loop and a 'scope.
YMMV,
-John
==
Hi
…. and the same cockroach approach is by far the easier way to take out a cell
system.
Bob
On Jul 15, 2012, at 12:34 PM, Chris Albertson wrote:
On Sun, Jul 15, 2012 at 2:48 AM, J. Forster j...@quikus.com wrote:
Rather than messing with WWVB, some LORAN-C should be put back on the air.
No you use a great number of tiny
overlapping cells combined with spread spectrum and strong encryption
and you control it with a some kind of self organizing mesh network,
not a top-down control system. What this does is mimic nature.
Think about rats and cockroaches
Chris Albertson
Was it GWEN (Ground Wave Emergency Network)? When it was shut down, many of
the transmitter sites were scheduled to be used as part of an inland LORAN
system run primarily for the railroads.
John WA4WDL
--
From: Don Latham d...@montana.com
I believe many of the GWEN sites were converted to VLF beacons transmitting
differential GPS reference data.
I know of one site in Crownsville, Maryland that does just that.
I don't know the up to data status of these sites now.
Regards,
Tom
- Original Message -
From: jmfranke
GWEN was a late cold war era LF cellular style communications system for use
within parts of the USA. Over the years I've seen a number of cesium standards
on Ebay being sold as ex GWEN equipment. As far as I know GWEN is long gone.
Supposedly some AM broadcast stations also transmitted fsk
http://www.fhwa.dot.gov/publications/publicroads/01septoct/gwen.cfm;
http://www.navcen.uscg.gov/?pageName=SiteLocations;
http://www.navcen.uscg.gov/pdf/ndgps/DGPS_Site_Table.pdf;
The only ones I know for a fact were former GWEN sites are Essex CA and ABQ NM.
I can hear 29 +/- of these with an
I can't seem to remember it's angle brackets you use to quote a url. Sorry
about that for those of you reading on the archive and getting bad links. Try
below:
On Jul 15, 2012, at 1:42 PM, John Seamons wrote:
http://www.fhwa.dot.gov/publications/publicroads/01septoct/gwen.cfm
This makes no sense.
The major expense of any radio system is not the transmitters, but the
infrastrcture to support those transmitters.
Things like land, towers, buildings, maintenance people, and legal costs
all are far more than a transmitter. And, have you looked at the cost of a
single
In my view a backup solution that allows the existing gps based timing
receivers to be used makes a reasonable ammount of sense. Another approach
could involve ground based transmitters on high buildings or mountain tops.
--
On Sun, 15 Jul, 2012 4:23 PM EDT J.
could be it...
Don
jmfranke
Was it GWEN (Ground Wave Emergency Network)? When it was shut down, many
of
the transmitter sites were scheduled to be used as part of an inland
LORAN
system run primarily for the railroads.
John WA4WDL
--
On 7/15/12 12:38 PM, Mark Spencer wrote:
Some form of backup to gps would be nice for timing purposes. I wonder if a
secondary sattelite based system for timing use only over the continental US
might be the way to go. (Ie. a transmitter on a geo stationary sattelite that
could emulate
On 7/15/12 1:32 PM, Mark Spencer wrote:
In my view a backup solution that allows the existing gps based timing
receivers to be used makes a reasonable ammount of sense. Another approach
could involve ground based transmitters on high buildings or mountain tops.
Retuned Lightsquared
Good point about WAAS. I wonder if newer timing receivers that support WAAS
would continue to function in a stationary mode if they could only receive
valid signals from WAAS ? I also wonder if the WAAS ground segment would
continue to function without GPS ? That being said the
Well, it could have been ELF whose Seafarer antenna was located at Clam Lake
Wisconsin. My grandfather built a vacation cabin just north of Clam Lake
and it was a big deal to visit the place. That was before the peaceniks
were demonstrating since they didn't seem to want our submarines to
On 07/16/2012 12:21 AM, Mark Spencer wrote:
Good point about WAAS. I wonder if newer timing receivers that support WAAS
would continue to function in a stationary mode if they could only receive
valid signals from WAAS ? I also wonder if the WAAS ground segment would
continue to function
I believe they called that system a bell ringer. It let the sub know that
it had to come close to the surface to receive new information. I'll need to
google around to find more about it.
We had a ELF transmitter (NSS) in Annapolis that transmitted about 1 MW at
about 24 kHz. Anyone ever seen
On Sun, Jul 15, 2012 at 5:24 PM, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
The benefit of WAAS and EGNOS is that they have a fixed location in the sky.
so you could use a highly directional antenna, like a parabolic antenna,
which would provide suppression of most jamming signal
On 7/15/12 6:25 PM, Chris Albertson wrote:
On Sun, Jul 15, 2012 at 5:24 PM, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
The benefit of WAAS and EGNOS is that they have a fixed location in the sky.
so you could use a highly directional antenna, like a parabolic antenna,
which would
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