David I. Emery wrote:
OK, you confused me (awfully easy to do these days as I sink
into senility) because I think of radar related events on a microsecond
and not a second scale. Obviously more or less the only thing happening
on a second scale is antenna rotation. And I believe when
On Wed, Sep 13, 2006 at 10:05:56AM -0400, Marcus Leech wrote:
> >>There are double pulses that I'm seeing, with variable timing between
> >>the main pulse
> >>and the sub-pulse. The other 1350Mhz radar is much further away from
> >>me, but
> >>perhaps the "sub pulses" I'm seeing are coming from
I have also used microdem with success.
http://www.usna.edu/Users/oceano/pguth/website/microdem.htm
At 10:22 PM 9/12/2006, Adam Porr wrote:
> I might also add that unless
propagation is strictly line of sight
> one needs more sophisticated path models to determine expected
signal power.
David I. Emery wrote:
On Tue, Sep 12, 2006 at 08:01:51AM -0400, Marcus Leech wrote:
David I. Emery wrote:
The transponders are 1090/1030 mhz and not 1350. 1350 is just
radar.
There are double pulses that I'm seeing, with variable timing between
the main pulse
and the
On Tue, Sep 12, 2006 at 08:01:51AM -0400, Marcus Leech wrote:
> David I. Emery wrote:
> >
> > The transponders are 1090/1030 mhz and not 1350. 1350 is just
> >radar.
> >
> There are double pulses that I'm seeing, with variable timing between
> the main pulse
> and the sub-pulse. The othe
> I might also add that unless propagation is strictly line of sight
> one needs more sophisticated path models to determine expected signal power.
> -11 dbm sounds rather loud.
If your current path loss calculator doesn't accomodate for terrain,
you might give SPLAT! (http://www.qsl.net/k
David I. Emery wrote:
The transponders are 1090/1030 mhz and not 1350. 1350 is just
radar.
There are double pulses that I'm seeing, with variable timing between
the main pulse
and the sub-pulse. The other 1350Mhz radar is much further away from
me, but
perhaps the "sub pulses"
On Mon, Sep 11, 2006 at 11:30:47PM -0500, Rick Parrish wrote:
> *giggle*
>
> Marcus ... that's an aircraft transponder. Except for some vintage
> 1930's aircraft that don't have an electrical system - every plane /
> helicopter has one. Hit Google or Yahoo! for "Mode-C" and "Mode-S"
> transpond
Here's a link on Mode A & C transponders (does not include newer mode-S)
http://www.airsport-corp.com/modec.htm
-rick
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*giggle*
Marcus ... that's an aircraft transponder. Except for some vintage
1930's aircraft that don't have an electrical system - every plane /
helicopter has one. Hit Google or Yahoo! for "Mode-C" and "Mode-S"
transponder.
The ground radar "pings" the aircraft's transponder (interrogation)
A little while ago, I posted a message talking about some "mysterious"
pulse-like interference I've been receiving
with my Gnu Radio/USRP/DBS_RX setup, using my radio-astronomy receiver
software. I affectionately
dubbed this signal "Pulsy McGrooder". Ok, so I'm a bit strange.
Tonight, I di
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