Ionizing Radiation at Altitude

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Took my dosimeter (radiation measurement tool, pretty much a computerized geiger counter) on an airline flight with me to highlight the ionizing radiation received while on an airline flight. I have yet to bring a dosimeter up on a skydive, but my assumption is that the dose rate at 18,000' would be under 1uSv/hr.

N America standard background at surface: .05-.15 uSv/hr
At 30,000' measured inside B737: 3.05-3.55 uSv/hr
Walking around the exterior of reactor 4 Chernobyl, Ukraine: 2.5uSv/hr

Just thought people might be curious about that.


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