Very true, they have been doing it for years, in the Untied States, but after googling for days, I can't find anyone in the UK who is doing this. Maybe it is because the balloons end up in the Atlantic, very much a worry for me. If anyone has any info on this in the UK (I know this is getting off topic) I'd sure appreciate it. Thanks for the links! Mark -----Original Message----- From: Steven Jenkins [mailto:steven.jenkins / ieee.org] Sent: 15 June 2005 06:32 To: ruby-talk ML Subject: Re: Crazy Balloon flight computer software... . Ham radio geeks have been at this for a while: http://users.crosspaths.net/~wallio/HABLinks.html Also check out APRS: http://web.usna.navy.mil/~bruninga/aprs.html Steve (N6UNI)