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

Scott Miller scott at opentrac.org
Tue Apr 28 12:46:46 EDT 2009

I've got to have some hardware before I start doing any promotional 
stunts!  I'm racing to get some more T2-301's and the new SAR trackers 
ready in time for Dayton.  Lots of supplier issues to deal with.

Speaking of which, if anyone knows what the heck is going on with Deluo, 
let me know.  They stopped answering emails, my orders haven't been 
processed, no one answers the phone there, and the last I heard from the 
CEO was that he was leaving to pursue other opportunities.

Deluo's been my backup GPS supplier for a long time, and since my 
primary supplier in Taiwan has been having trouble (variously due to 
injection mold damage, subcontractors going out of business, or whatever 
the excuse is this month) I've got a lot of orders with Deluo GPS 
receivers on hold.

I'm already working on going back to THEIR suppliers in Taiwan and 
getting the same units directly, but that's going to take some time.

Thanks to all of you and your continued orders my sales are steady 
despite the recession, but it's killing me on the supply end with 
vendors going out of business or cutting back production.


Jeff King wrote:
> Scott:
> 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:
> http://wiki.argentdata.com/index.php?title=Scripting
> 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 
> <mailto: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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