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A systematic global mapping of the radiation field at aviation altitudes

This paper presents early results from aircraft measurements made by a Low‐LET Radiation Spectrometer (LoLRS), as part of a long‐range effort to study the complex dynamics of the atmospheric radiation field. For this purpose a comprehensive database is being generated to enable a multivariable global mapping (and eventually modeling) of doses and Linear‐Energy‐Transfer (LET) spectra at aviation altitudes. To accomplish this, a methodical collection of data from the LoLRS (and other instruments) is planned over extended periods of time, in a manner that complements some previous isolated and sporadic measurements by other workers, with the objective to generate a detailed long‐range description of the cosmic‐ray induced particle environment and to study its variability and dependence on atmospheric thickness, magnetic latitude, L‐shell or rigidity, space weather, solar particle events, solar cycle effects, magnetic field variation, diurnal and seasonal effects, and atmospheric weather. Comparison of total doses with predictions is in good agreement.