Hello,
Maybe some of you will find useful for Loran monitoring the software
Markus, DF6NM wrote quite a while ago:
http://www.alice-dsl.net/df6nm/LoranView/LoranGrabber.htm He was nice
enough to make a newer version for my use which uses PPS for
synchronization: http://qsl.net/4x1rf/loran/loran.ht
Hi,
On Monday, March 05, 2012 10:18:58 PM Sam Reaves wrote:
> Hello Group,
>
> I just bought four of the FE5680A's that have the standard configuration
> Pin 1+15, Pin 2 Gnd, Pin 3 Lock, Pin 4 +5V Pin 5 Gnd, Pin 6 1pps?, Pin 7
> 10MHz, Pin 8 TX, Pin 9 RX.
>
> I have a LED with a 330 ohm current
Sam,
As far as the 1pps is concerned, it is only 1 microsecond in width. So, I doubt
you are going to see it on the LED without a pulse stretcher as that is too fast
for your eyes. Use a one shot to lengthen the pulse to at least 1/2 second.
The RS-232 is used to command very small frequency ad
Hello Group,
I just bought four of the FE5680A's that have the standard configuration
Pin 1+15, Pin 2 Gnd, Pin 3 Lock, Pin 4 +5V Pin 5 Gnd, Pin 6 1pps?, Pin 7
10MHz, Pin 8 TX, Pin 9 RX.
I have a LED with a 330 ohm current limiting resistor on pin 3 (the
74ACT240 can sink up to 24mA and I am well
Hi
Ok, that's more information than we had before about what they are trying to
do. Precise timing sounds like a good thing for them to work on :)...
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Greg Broburg
Sent: Monday, March
On 03/05/2012 03:40 PM, John Ackermann N8UR wrote:
An interesting complexity of any new Loran system is that it won't be
able to rely on GPS for time synchronization!
There is nothing wrong with using GPS WHEN it works, but one has to
check if it is not reliable such that one can cut off the d
>
> 5. Counselman Charles C III, Hall Timothy D: Instantaneous radiopositioning
> using signals of opportunity. Massachusetts Institute of Technology Jul, 25
> 2002: WO 2002/057806
>
That is an incredibly interesting patent. Thanks for the reference.
Peter
K1PGV
_
5. Counselman Charles C III, Hall Timothy D: Instantaneous
radiopositioning using signals of opportunity. Massachusetts Institute of
Technology Jul, 25 2002: WO 2002/057806
-John
==
> On Mon, Mar 5, 2012 at 10:09 AM, J. Forster wrote:
>> Already been done, and patented, without
On Mon, Mar 5, 2012 at 10:09 AM, J. Forster wrote:
> Already been done, and patented, without adding pulses to existing AM
> stations.
Would you happen you know the patent number or something else I could
use to do a search on it? I know some one who is working on this.
I'd like to be able
Reply to Keith Peshak from Chris Stout.
As of now, we don't currently have a schedule for when we will be back on-air.
Because we are testing precise timing capabilities under the CRADA, we are only
broadcasting from one station which is all that is necessary for disseminating
timing informa
Already been done, and patented, without adding pulses to existing AM
stations.
-John
==
> The best and by far lowest cost solution is to pay TV stations and
> maybe AM broadcast stations to add a timing pulse a few times per
> second. No transmitters to build. The receivers wou
If the old antennas are still in good shape, why not use them?
The post suggesting a LightSquared involvement is interesting.
Suppose LightSquared paid for a LORAN system to eliminate some opposition
to the deployment of their wifi network?
-John
===
> Hi
>
> If you are doing a "light
The best and by far lowest cost solution is to pay TV stations and
maybe AM broadcast stations to add a timing pulse a few times per
second. No transmitters to build. The receivers would be more
complete but that is OK in 2012. In the "old days" it was to
expensive to put a complex computer i
Hi
If you are doing a "light footprint" system, why fire up the old heavy
footprint gear at all?
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of J. Forster
Sent: Monday, March 05, 2012 10:40 AM
To: Discussion of precise time and fr
A woman is waiting outside of the operating room for news of her
husbands fate. After some hours of waiting a physician comes to her and
in a soft voice gives her the news that he has passed. The situation at
hand was that the paperwork was beyond the operating teams capabilities.
We will lea
On 3/5/2012 10:13 AM, Poul-Henning Kamp wrote:
In message<4f54d075.6070...@febo.com>, John Ackermann N8UR writes:
An interesting complexity of any new Loran system is that it won't be
able to rely on GPS for time synchronization!
Well, define "rely". If they're using a Cs and GPS-steer that
A "light footprint" LORAN is what I've been suggesting for several days.
As to putting it into private hands, there is a potential for massive
finmancial fraud in market arbitrage. It was only a couple of weeks ago
that this made headlines with GPS timing.
-John
=
> In message <20
In message <4f54d075.6070...@febo.com>, John Ackermann N8UR writes:
>An interesting complexity of any new Loran system is that it won't be
>able to rely on GPS for time synchronization!
Well, define "rely". If they're using a Cs and GPS-steer that when
there is good GPS, I don't see much of a p
An interesting complexity of any new Loran system is that it won't be
able to rely on GPS for time synchronization!
John
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and
On 3/5/12 6:19 AM, Charles P. Steinmetz wrote:
Poul-Henning wrote:
Thats why some people in the military is looking into a modern
more lightweight version of "Tactical Loran" for use when GPS is jammed.
That is a much easier thing -- our military/intelligence complex
(however oxymoronic that
On 3/5/12 3:45 AM, Poul-Henning Kamp wrote:
In message<20120305113804.48fc411b...@karen.lavabit.com>, "Charles P. Steinmet
z" writes:
Technical merit aside, I doubt there is any chance of getting
regulatory approval for such a system, at least in the US, for
practical and political reasons.
I
On 3/5/12 2:31 AM, Charles P. Steinmetz wrote:
Poul-Henning wrote:
That would make roll-out a matter not for governments, but for
airports, harbours and other interested parties, like for instance
DME.
Would this mean depending on private parties for precision timing and
positioning [using th
Poul-Henning wrote:
Thats why some people in the military is looking into a modern
more lightweight version of "Tactical Loran" for use when GPS is jammed.
That is a much easier thing -- our military/intelligence complex
(however oxymoronic that notion is) tries very hard to keep its
engagem
Folks, I have received the following notice:
___
NOTIFICATION OF A GPS JAMMING EXERCISE SENNYBRIDGE TRAINING AREA, WALES
Dates: Between 11-15, 18-22, and 25-29 June 2012 inclusive
Times: : BETWEEN 0900 BST AND 1800 BST.
Location of jammers: Land based within 5km o
In message <20120305113804.48fc411b...@karen.lavabit.com>, "Charles P. Steinmet
z" writes:
>Technical merit aside, I doubt there is any chance of getting
>regulatory approval for such a system, at least in the US, for
>practical and political reasons.
Indeed, it's absolutely out of the question
Poul-Henning wrote (regarding the possibility of advanced, private
Loran-like systems):
Well, that could be your own choice, you can tell your receiver
which transmitters you trust.
That presumes (i) substantial sophistication on the part of the user
and (ii) possession of data that would be
In message <20120305103136.7e0f511b...@karen.lavabit.com>, "Charles P. Steinmet
z" writes:
>Poul-Henning wrote:
>
>>That would make roll-out a matter not for governments, but for
>>airports, harbours and other interested parties, like for instance
>>DME.
>
>Would this mean depending on private part
Poul-Henning wrote:
That would make roll-out a matter not for governments, but for
airports, harbours and other interested parties, like for instance
DME.
Would this mean depending on private parties for precision timing and
positioning [using that particular system, of course]? If so, I'm
I agree.
On Mon, Mar 5, 2012 at 10:24 AM, Poul-Henning Kamp wrote:
> In message , Bob Camp
> writes:
>
> >You still come back to what killer Loran-C in the first place -
> >Who is going to use it?
>
> No, I don't particularly think Loran-C is a "killer", but until recently
> it was the only feasi
In message , Bob Camp writes:
>You still come back to what killer Loran-C in the first place -
>Who is going to use it?
No, I don't particularly think Loran-C is a "killer", but until recently
it was the only feasilble backup for fragile GNSS signals.
>Until somebody shuts down GPS in a big way,
Yes, the Raynav 520 (a simple navigation receiver, not timing) undestands 4
digits GRIs but its level indicator doesn't show anything for the Lessay
chain. I have to double check the antenna and antenna preamp...
On Sun, Mar 4, 2012 at 10:53 PM, J. Forster wrote:
> Neither does the 2100F, althou
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