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Badhwar-O'Neill 2014 Galactic Cosmic Ray Flux Model DescriptionThe Badhwar-O'Neill (BON) Galactic Cosmic Ray (GCR) model is based on GCR measurements from particle detectors. The model has mainly been used by NASA to certify microelectronic systems and the analysis of radiation health risks to astronauts in space missions. The BON14 model numerically solves the Fokker-Planck differential equation to account for particle transport in the heliosphere due to diffusion, convection, and adiabatic deceleration under the assumption of a spherically symmetric heliosphere. The model also incorporates an empirical time delay function to account for the lag of the solar activity to reach the boundary of the heliosphere. This technical paper describes the most recent improvements in parameter fits to the BON model (BON14). Using a comprehensive measurement database, it is shown that BON14 is significantly improved over the previous version, BON11.



Document ID
20150003026
Acquisition Source
Johnson Space Center
Document Type
Technical Publication (TP)
Authors
O'Neill, P. M.
(NASA Johnson Space Center Houston, TX, United States)
Golge, S.
(Houston Univ. Houston, TX, United States)
Slaba, T. C.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
March 17, 2015
Publication Date
March 1, 2015
Subject Category
Space Radiation
Report/Patent Number
NASA/TP-2015-218569
JSC-CN-32930
Funding Number(s)
CONTRACT_GRANT: NAS902078
Distribution Limits
Public
Copyright
Public Use Permitted.
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