"For a jet cruising at 39,000 feet, the total radiation is about 64 times higher than at sea level. If you drop down to 33,000 feet, it is only about 35 times greater than sea level," she said.

May and the union are calling for more thorough training for air crews so that they better understand their exposure risks to radiation. They are asking for better tracking of the radiation exposure of crew members and studies to see if the exposure presents any long-term health risks.


"A typical air crew member may experience about 200 millirems to 400 millirems more exposure to ionizing radiation than the general population per year. The pilots and flight attendants working routes over the Pacific or Atlantic Ocean will likely top 500 millirems of radiation exposure. "






http://in.news.yahoo.com/040706/137/2etdf.html



Aircraft windows block ultraviolet radiation, and measurements of ultraviolet radiation reveal only minimal exposure in the cockpit at high cruise altitudes.

http://www.bmj.com/cgi/content/full/325/7364/567