So, my question is this: What altitude are all these measurments and exposures based on?
Jed_thrust, what a silly question! Aircraft altitude, of course!
Measured how? I know my altimeter (on 1013) can read significantly lower than my GPS-derived altitude: I have seen it as much as 7000' different when trudging across the Pacific.
Seeing how 4000' can (roughly) double your radiation exposure, it might make a big difference to the annual total.
Does any bright spark have any sensible offers?
