VARIATIONS IN ASTRONAUT RADIATION EXPOSURE DUE TO ANISOTROPIC SHIELD DISTRIBUTION

The dose incurred in an environment generated by extraterrestrial spac e radiations within an anisotropic shield distribution depends on the orientation of the astronaut's body relative to the shield geometry. T he fluctuations in exposure of specific organ sites due to astronaut r e-orientation are found to be a factor of 2 or more in a typical space habitation module and typical space radiations. An approximation func tion is found that overestimates astronaut exposure in most cases stud ied and is recommended as a shield design guide for future deep space missions.