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Natural and Induced Environment in Low Earth OrbitThe long-term exposure of astronauts on the developing International Space Station (ISS) requires an accurate knowledge of the internal exposure environment for human risk assessment and other onboard processes. The natural environment is moderated by the solar wind which varies over the solar cycle. The neutron environment within the Shuttle in low Earth orbit has two sources. A time dependent model for the ambient environment is used to evaluate the natural and induced environment. The induced neutron environment is evaluated using measurements on STS-31 and STS-36 near the 1990 solar maximum.
Document ID
Document Type
Technical Memorandum (TM)
Wilson, John W.
(NASA Langley Research Center Hampton, VA United States)
Badavi, Francis F.
(Christopher Newport Univ. Newport News, VA United States)
Kim, Myung-Hee Y.
(College of William and Mary Williamsburg, VA United States)
Clowdsley, Martha S.
(Old Dominion Univ. Norfolk, VA United States)
Heinbockel, John H.
(Old Dominion Univ. Norfolk, VA United States)
Cucinotta, Francis A.
(NASA Johnson Space Center Houston, TX United States)
Badhwar, Gautam D.
(NASA Johnson Space Center Houston, TX United States)
Atwell, William
(Boeing Co. Houston, TX United States)
Huston, Stuart L.
(Boeing Co. Huntington Beach, CA United States)
Date Acquired
September 7, 2013
Publication Date
May 1, 2002
Subject Category
Space Radiation
Report/Patent Number
NAS 1.15:211668
Funding Number(s)
PROJECT: RTOP 705-30-11-11
Distribution Limits
Work of the US Gov. Public Use Permitted.
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