On 14 July 2012 04:04, Bill Fuqua wlfuq...@uky.edu wrote:
Has anyone ever used an Lock-in Amplifier such as
a PAR HR-8 or later models as part of a receiving
system for WWVB? These are mostly used in detecting
weak signals in noise in scientific experiments. Some have used
the analog
On 07/14/2012 06:47 AM, Brooke Clarke wrote:
Hi:
The key thing GPS is lacking is Daylight Savings Time.
WWV WWVB have the DST bits that allow a clock to show the local time.
One reason GPS doesn't have it is that it is not coordinated globally.
For instance, US is not shifting DST at the
Hi
I think the answer to how many places would it be used is to simply count the
number of things that have the wrong time on them each time the power burps.
There are maybe a dozen gizmos like that in this room (yes I'm in the kitchen).
Bob
On Jul 14, 2012, at 12:41 AM, Hal Murray wrote:
I don't see why school crossing signs, water sprinklers, street or outdoor
lighting need 1 second timing. Ten minutes, or a photocell, would be more
than adequate.
Synchronized traffic lights, perhaps. But there are other cheaper, ways of
doing that like a simple radio link.
-John
Just out of interest, does anyone know why the Sigem SGM5610 GPS module,
later rebranded as the Mobile Knowledge MKN5610, seems to be very popular?
I can't find a spec for 1PPS accuracy in either the data sheet or manual
so wouldn't expect too much demand for timing purposes, but of all the
Yes, interesting... I have never downloaded but maybe in those files there
is a utility, a viewer, a document that is useful with other GPS receivers
or even for other purposes.
On Sat, Jul 14, 2012 at 4:13 PM, gandal...@aol.com wrote:
Just out of interest, does anyone know why the Sigem
Oh, is it the 48MB .PDF I have just seen? Then no utilities... this is very
strange.
On Sat, Jul 14, 2012 at 4:22 PM, Azelio Boriani azelio.bori...@screen.itwrote:
Yes, interesting... I have never downloaded but maybe in those files there
is a utility, a viewer, a document that is useful with
I am a bit confused about Lady Heather's settings for screen resolution.
/vc=rowsXcols - custom screen size (e.g. /vc=1200x800)
My laptop's native resolution is 1280 x 800 pixels but pixels and rows cols
are different measurements right? Is there a correlation?
I am getting the scaled down
Not sure what you've found that's 48MB, this one is only 1650KB:-)
_http://rapidshare.com/files/317504924/MKN5610_060502.pdf_
(http://rapidshare.com/files/317504924/MKN5610_060502.pdf)
It does mention a software utility called ADK View, but I've never found a
copy of that.
Regards
Nigel
It's not actually a flare.that has been and gobe it a great bif glob of
plasma, ejected by the same region. Spaceweather.com has a reputation for
over-hyping these CME events. I could cause problems but there are a lot of
conditions to be met before it is a disaster. Enjoy the aurora :-))
Using the FILECROP searching tool a .PDF of 48MB comes out... maybe the
size indication is wrong.
On Sat, Jul 14, 2012 at 4:42 PM, gandal...@aol.com wrote:
Not sure what you've found that's 48MB, this one is only 1650KB:-)
_http://rapidshare.com/files/317504924/MKN5610_060502.pdf_
Joe, Cellphone frequencies are little affected by ionospheric effects, so I
would be surprised if that was an effect though GPS is a different matter,
or sat-phone.
Alan
G3NYK
- Original Message -
From: Joseph Gray jg...@zianet.com
To: Discussion of precise time and frequency
Looks like this flare was a non-event:
http://www.jackson-labs.com/images/gpsstat.htm
On Jul 14, 2012, at 7:49, Alan Melia alan.me...@btinternet.com wrote:
It's not actually a flare.that has been and gobe it a great bif glob of
plasma, ejected by the same region. Spaceweather.com has a
Perhaps some of the cellular bands aren't affected, perhaps some are.
I don't know the specific cause of yesterday's loss.. GPS uses around
1200/1500 MHz. The phone in question uses 850/1900 Mhz bands, so I
think we're in the neighborhood.
Joe Gray
W5JG
On Sat, Jul 14, 2012 at 9:35 AM, Alan
On 7/14/12 9:19 AM, Joseph Gray wrote:
Perhaps some of the cellular bands aren't affected, perhaps some are.
I don't know the specific cause of yesterday's loss.. GPS uses around
1200/1500 MHz. The phone in question uses 850/1900 Mhz bands, so I
think we're in the neighborhood.
GPS signals
OK have been doing a lot of experimenting.
I was curious what is the GPS tick in relationship to wwvb. Especially
since it is a reliable 1 sec marker.
Using a Tbolt since everyone has one on the list. ;-) And monitoring the 10
us tick to the wwvb 60 Khz carrier on a scope. Amazingly and over at
On Sat, Jul 14, 2012 at 06:15:14AM -0700, J. Forster wrote:
I don't see why school crossing signs, water sprinklers, street or outdoor
lighting need 1 second timing. Ten minutes, or a photocell, would be more
than adequate.
While there are many many other applications, the issue for
Hi
The zero crossing is very arbitrary. If it's correct at the transmit site, it
will then be off everywhere else by the speed of light / distance. You will
appear to be correct once every wavelength away from Colorado (roughly every 3
miles). You won't really be correct because you are
Bob
Yes nights are bad for me, east coast and MSF interference.
So it could be any number of 60 KHz crossing its just odd it lined up the
way it did and I double confirmed that I was not doing something silly like
using alternate triggers.
Very careful analysis does show a 1-2 us jitter and at
Paul,
On 07/14/2012 10:56 PM, paul swed wrote:
Bob
Yes nights are bad for me, east coast and MSF interference.
So it could be any number of 60 KHz crossing its just odd it lined up the
way it did and I double confirmed that I was not doing something silly like
using alternate triggers.
As
Hi
Well between now and midnight, you will completely loose signal at least once.
It's a pretty dramatic amplitude dip as sunset gets right to the wrong place.
Bob
On Jul 14, 2012, at 4:56 PM, paul swed wrote:
Bob
Yes nights are bad for me, east coast and MSF interference.
So it could be
GM List,
What has not been mentioned so far is national security needs of the democratic
nations of the world for uninterrupted accurate time/frequency information that
is not subject to interference or destruction by those nations diametrically
opposed to personal freedom.
The United States
Perry you mean like the 10' X 10' loop I put up?
It has about 800 ft of wire.
Brang the daytime signal fro 30 uv to an easy 60 +.
Compared to a 2.5 ft loop.
Yes higher power would be good.
Regards
paul
On Sat, Jul 14, 2012 at 9:43 PM, Perry Sandeen sandee...@yahoo.com wrote:
GM List,
What has
Might loose the signal not unusual and it did shift +5-8 us tonight aligned
to the diurnal shift.
So maybe this is not so crazy of an approach.
Regards
Paul
On Sat, Jul 14, 2012 at 5:53 PM, Bob Camp li...@rtty.us wrote:
Hi
Well between now and midnight, you will completely loose signal at
Offhand I'd estimate it would be easier for some bad guys
to put a crude A-bomb on top of a SCUD and put America
into the horse and buggy age with an EMP attack than to
take out a significant number of GPS satellites.
NLK in Washington state has been off the for almost
two months now. Depending
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