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[aprssig] APRS DFing final result

Robert Bruninga bruninga at usna.edu
Fri Mar 10 13:03:32 UTC 2006


It was not found, but indications were pointing to a 
location with a digi and that digi had not been
heard corresponding to the approximate timing of 
the problem.  Its 100mi from me, so I was not
involved other than plotting the few reports I saw.
bob

>>> dave at emv.co.uk 03/10/06 4:23 AM >>>
But...

What was the actualy source and cause of the signal in the end?  A
Screaming Digi, or some other system gone nutt's, or sproggie generator?

And who did you have to contact to get it stopped?  Probably as
important information as how you located it.

Dave G0WBX.
 

> -----Original Message-----
> From: Robert Bruninga [mailto:bruninga at usna.edu] 
> Sent: Thursday, March 09, 2006 4:35 PM
> To: tacos at amrad.org; n2csq at madxra.org; 
> vws at mail.viennawireless.org; farc at mailman.qth.net; 
> mcfadyenusa at yahoo.com
> Cc: aprssig at lists.tapr.org
> Subject: [aprssig] APRS DFing final result
> 
> This DF event was a good lesson.  The OMNI-signal system 
> works, but I was 50 miles off because I made two mistakes:
> 1) Assumed a typical fox or mobile with limited range
> 2) Jumped to conclusion too quickly with only 3 data points.
> 
> The 4th report that came in instantly invalidated the 
> original guess and also indicated not a small, limited range 
> jammer, but a big one high up and far off.
> 
> See the final solution now plotted in the 3 consequitive 
> links in the 4th paragrpah of the APRS DFing page:
> 
> http://www.ew.usna.edu/~bruninga/dfing.html
> 
> end of drill.
> Bob, WB4APR
> 
> 
> 
> 

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