[aprssig] BALLOON unproto paths

Joe Della Barba joe at dellabarba.com
Mon Apr 4 20:02:02 EDT 2005

Now you explain it that way, I guess the exposure time of RELAY while in 
flight would be small. I would try WIDE2-1 at altitude and maybe RELAY,WIDE 
or RELAY,WIDE2-2 for the "fall". I have good luck with my Tiny Track for 
airmobile ops. It is easy to switch it between 2 different paths.
73 De N3HGB

----- Original Message ----- 
From: "Jason Winningham" <jdw at eng.uah.edu>
To: "Joe Della Barba" <joe at dellabarba.com>; "TAPR APRS Mailing List" 
<aprssig at lists.tapr.org>
Sent: Monday, April 04, 2005 7:50 PM
Subject: Re: [aprssig] BALLOON unproto paths

> On Apr 4, 2005, at 5:55 PM, Joe Della Barba wrote:
>> I would NEVER operate airmobile with RELAY in the path. Why not just use 
>> WIDE1-1 at high altitude and WIDE2-2 at low altitude?
> For starters, because not all digis are WIDEn-n capable. Besides that, we 
> _need_ APRS to recover our payloads.
> We're flying high altitude balloons, which have low powered trackers, 
> travel laterally as much as 150mph, achieve 90k to 100k feet, then drop 
> rapidly, and frequently land in some hollow (more correctly, in the top of 
> some tree in some hollow) in the southern end of the Appalachian mountain 
> range.  We _need_ those last few positions in order to recover the 
> payload.  It is tough to launch and then get to the landing area quickly 
> enough to get a direct packet.  We can't count on volunteers to be in the 
> landing area ahead of time every time, so we have to assume we are the 
> only recovery effort in place.  The ham community does help us 
> tremendously, but their schedules don't always allow them to be there.
> Previously we have flown trackers based on the KPC 3 plus, which is (IMO) 
> an extremely poor tracker.  I want to switch entirely to using something 
> quite a bit smaller and smarter (the opentracker) to allow me to do things 
> like switch paths at an appropriate altitude so I can be a good citizen on 
> 144.39 when I'm at a high altitude, but get still get enough hops on my 
> packets when they're close to the ground.
> -Jason
> kg4wsv
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