[FoxHunt] Test

R. Simmons pelican2 at silcom.com
Tue Apr 28 10:39:45 EDT 2020


Integrating ( apparently ) random Doppler readings was done years ago :

	http://www.silcom.com/~pelican2/PicoDopp/PICODOPP.htm#WDP

	http://www.silcom.com/~pelican2/PicoDopp/WINDOPP_MORE.html

===================

Signal integration should only work if the errors are, themselves, "truly
random".

If the errors are caused by a low signal level ( i.e. "white noise" ) then
it should work.

===================

Reflections are not really "random", they are just "uncontrolled", and too
complex to predict.

If you don't believe it, stop your car and notice that the signal "flutter"
stops...

Bob S.



-----Original Message-----
From: foxhunt-bounces at mailman.qth.net
[mailto:foxhunt-bounces at mailman.qth.net] On Behalf Of Bernie Hunt
Sent: Tuesday, April 28, 2020 4:51 AM
To: Radio Direction Finding
Subject: Re: [FoxHunt] Test

There is one thing that makes it hopeful, by capturing the readings and
storing them a trend may be found. I've always wondered if in those time
when a Doppler seems random in its readings if there was a pattern hidden
underneath the multipath. It will be interesting if the SDR DF can do that.
It doesn't solve and age old problem of if you can't hear it you can't hunt
it.

Bernie
K2YO

-----Original Message-----
From: foxhunt-bounces at mailman.qth.net
[mailto:foxhunt-bounces at mailman.qth.net] On Behalf Of Tony
Sent: Tuesday, April 28, 2020 7:32 AM
To: foxhunt at mailman.qth.net
Subject: Re: [FoxHunt] Test

HI,

We are having foxhunts every weekend. Let us know how the SDR DF works, I
suspect its like the old Doppler units.

Tony

AA9CC

On 4/27/20 2:58 PM, Mike (KA5CVH) Urich wrote:
> On Mon, Apr 27, 2020 at 2:34 PM Bryant <skysho at comcast.net> wrote:
>
>> Anybody have some good suggestions to get folks motivated?  Last year I
spent the bucks on the Kerberos SDR and have yet to take it out on a hunt.
Anybody else on this list using the device?
> I have the sniffer ... http://www.foxhunt.com.au/ and a 3L tape 
> measure yagi for VHF.
>
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