Geiger Counter on a Plane 
In this video, we bring a portable Geico counter onto a plane for a transpolar flight to evaluate radiation levels at ground level, 10,000 feet, 20,000 feet, 30,000 feet, and 37,000 feet which was the maximum altitude of the plane. The results are quite surprising, particularly above 20,000 feet. For example at 37,000 feet, background radiation levels recorded 25 times higher compared with ground level. This would be equivalent to receiving an entire years worth of background radiation in 12 days at this altitude. Pilots, flight crew are considered radiation workers. For transpolar flights, radiation exposure can be up to 6 millisieverts per year. This is a equivalent to 60 chest x-rays. 20 millisieverts would be considered a dangerous on safe level and would be flagged. However, it should be noted that pilots and flight attendants still receive the highest level of exposure out of all of the radiation workers at a total of 3.07 mSv per year. 
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