Short Term Variation of Cosmic Radiation on Aircraft at Constant Flight Condition

Abstract:

The temporal variation of cosmic radiation was measured by Liulin detector on aircraft at constant flight condition. In this experiment, instead of using a commercial aircraft that flies over long distances, we used a military reconnaissance aircraft performing a circular flight over Korean Peninsula. Measurements indicate that the radiation dose is approximately 2.12 ~ 2.88 Sv/hr at 30,000 ft. We obtained two observational results from this experiment. First, changes in dose rate occurred within a flight time of 5 - 7 hours. Second, no strong correlation was revealed between cosmic rays observed from the ground using the Neutron Monitor and the radiation dose. Our experimental results imply that changes in cosmic radiation at the flight altitude are affected by unknown factors that might be investigated in the point of space weather.