Geographical influence on the radiation exposure of an aircrew on board a subsonic aircraft

Radiation fields on board a subsonic aircraft have been studied on board an airbus A310-300 during the flights Prague - Abu Dhabi - Bangkok and Bangkok - Abu Dhabi - Prague, during February 1995. A complex set of mea­ suring instruments has been used for these studies: tissue equivalent proportio­ nal counter, moderator-type neutron rem-meter, environmental radiation dose rate meter, thermoluminescent and track etch detectors and bubble detectors. The results obtained are presented and analyzed; they are compared with the results obtained in the flights Prague - Montreal - Prague. Conclusions concer­ ning the influence of geographical parameters on the aircrew exposure levels are formulated.