Prediction Software
Jet Stream - http://squall.sfsu.edu/crws/jetstream.html
Flight Prediction -http://nearspaceventures.com/w3Baltrak/readyget.pl
http://habhub.org/predict/#!/uuid=6e3419fa03be761e0098cb5c4151d742f0c23c9c
Here are links to various sites that I have found to be a tremendous help in establishing this program.
University of Idaho VAST
Idaho Space Grant Consortium
Montana State University Borealis
A good site that has many schematics for various projects.
An easy Offset Attenuator Project for RDF.
Near Space Ventures
Paul Verhage's site
MicroHunt DF Transponder
Byonics transponders
amateur radio high altitude ballooning (arhab)
HARBOR