Decoding radio telemetry heard on news helicopter video footage with GNU Radio
Just because it takes a few clicks from the article to get there, Oona Raisanen (aka windytan) did this originally.<p><a href="http://www.windytan.com/2014/02/mystery-signal-from-helicopter.html" rel="nofollow">http://www.windytan.com/2014/02/mystery-signal-from-helicopt...</a><p>If this interests you at all highly recommend you check out her blog.