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What is cosmic radiation? The origins of radiation A galactic origin A solar origin Radiation in the earth's environment Protection of the magnetosphere Protection of the atmosphere Ground-level ambient ionising radiation Exposure to cosmic radiation in the plane Influence factors Exposure increases with altitude Exposure varies with latitude Exposure depends on the flight's duration Protection of flight personnel European regulations Assessment of radiation doses received during flights S.I.E.V.E.R.T. usage principal Using S.I.E.V.E.R.T. to calculate doses Validation of dosimetric data The health effects of radiation Case of exposure leading to the appearance of acute effects Case of exposure leading to the appearance of deferred effects Exposure to weak doses Measuring radiation and assessing its effects Gray: measuring the absorbed energy Sievert: the assessment of the biological risk Means for measuring radiation on board aircraft The experts tell you more Pierre Lantos (astrophysicist at the Paris-Meudon Observatory) Margot Tirmarche (epidemiologist at the IRSN) Laurence Lebaron (medical doctor at the IRSN) Frequently asked questions Glossary Partners