Cosmic Radiation during PRG-PAR Flight HammerHead HH response for Ḣ*(10)cosmic depending on altitude. Measurements were performed during the descent Airbus A319 flight level of 12 km. The course is consistent with software Expacs (RGRTA, Japan Atomic Energy Agency), which is used to calculate the effective dose and Ḣ*(10) of cosmic radiation in the atmosphere. Measurement was carried out in 2015 on the Prague – Paris route in cooperation with the Department of Radiation Dosimetry of the Czech Academy of Sciences.