title: A parametric study of space radiation exposures to critical body organs for low earth orbit missions.
abstract: The geomagnetically-trapped and galactic cosmic radiation environments are two of the major sources of naturally-occurring space radiation exposure to astronauts in low earth orbit.  The exposure is dependent primarily on altitude, spacecraft shielding, crew stay-times, and solar cycle effects for a 28.5 deg orbital inclination.  Based on Space Shuttle experience, the calculated results of a parametric study are presented for several mission scenarios using a computerized anatomical man model and are compared with the NASA crew exposure limits for several critical body organs.
authors.affiliation: Rockwell International, Houston, TX 77058.
authors.forename: W
authors.initials: W
authors.lastname: Atwell
authors.forename: E R
authors.initials: ER
authors.lastname: Beever
authors.forename: A C
authors.initials: AC
authors.lastname: Hardy
mesh_terms: D000531:Altitude; D003198:Computer Simulation; D003359:Cosmic Radiation; D004307:Dose-Response Relationship, Radiation; D006615:Hip / Q000473:pathology / Q000528:radiation effects; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007908:Lens, Crystalline / Q000473:pathology / Q000528:radiation effects; D008297:Male; D008954:Models, Biological; D011522:Protons; D011835:Radiation Protection / Q000379:methods / Q000592:standards*; D012867:Skin / Q000473:pathology / Q000528:radiation effects; D016082:Solar System; D013026:Space Flight; D013249:Sternum / Q000473:pathology / Q000528:radiation effects; D013997:Time Factors
chemical_list: D011522:Protons