[aprssig] Trans-Atlantic APRS Balloon Flight Wed 29 April!

Jeff King king.robert.j at gmail.com
Tue Apr 28 12:13:09 EDT 2009

Yeap, I've figured if someone already hadn't done it, it was trivial. I was
going to suggest the behavior of the tracker could also be influenced by
altitude (beacon rate, digi path) but I'm seeing not only can that be done,
but you provided examples:


Hey, maybe you can get a sticker on the side of the balloon payload, aka
NASCAR, if they use your tracker?

On Tue, Apr 28, 2009 at 11:56 AM, Scott Miller <scott at opentrac.org> wrote:

> I wonder how much time it would have taken to put this pseudo-code in the
>> firmware?
>> if ((longitude > -30) && (longitude < 180))     set_frequency(144800);
>> else
>>     set_frequency(144390);
> You can actually do that in the T2-301's scripting system, more or less.
>  You have to define geographic areas with lat/lon corners, but that could be
> an entire hemisphere.  And you have to check that you only make the
> frequency change when crossing in or out of the region, so that it doesn't
> try to change frequencies constantly.
> Hmm, maybe I'll write a default script for the 301 that sets it to the
> local APRS frequency for whatever region you're in...
> Scott
> N1VG
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