[aprssig] Vicinity plotting of stealth digipeaters

Andrew P. andrewemt at hotmail.com
Thu Dec 11 09:05:11 CST 2014

Does anyone have any advice or opinion on vicinity plotting of stealth digipeaters? Or have I stepped into a brave new world here?

Andrew, KA2DDO

-------- Original message --------
From: "Andrew P." <andrewemt at hotmail.com>
Date:12/05/2014  13:20  (GMT-05:00)
To: TAPR APRS Mailing List <aprssig at tapr.org>
Subject: [aprssig] Vicinity plotting of stealth digipeaters

Greetings, all.

I've got a question about vicinity plotting (i.e., guessing where a station is based on its first digipeater's position when the station hasn't reported its position yet).

Is it reasonable to do this in reverse, i.e., guessing where a first digipeater is, based on the position report of the digipeated station? Because stealth (non-beaconing) digipeaters are common in my area, I have implemented a first draft of this in my YAAC program.

I assume this needs to be improved, perhaps using direction-finding tricks such as guessing the digipeater has to be within the PHG range circles of all stations it has first-digipeated.

But should I be doing this kind of approximation at all?

Just curious.

Andrew, KA2DDO
(putting my asbestos shorts on now :-)
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