Detecting Cosmic Rays on planes

On my flight today, I was chatting with a fellow who worked on CO2 lasers– since I happen to have my USB Radiation detector I figured this would be a good opportunity to detect the Cosmic rays coming in to the plane with interested parties. It worked (photo here). The detector picked up 80, 120 and 240 Muon Count Rate (cpm). I haven’t dumped all the data and looked it up yet- seems harmless of course, but it was really neat to detect stuff while high above the clouds at 20,000 feet. When I get time, I’ll map the data with GPS, Sat photos and altitude- kinda like war driving for radiation.