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An empirical model of energetic solar proton fluxes with applications to earth orbiting spacecraftAn empirical model for energetic solar proton fluxes is presented. With this model, the effects of such protons on geocentric space missions, to be flown during the next solar active period (1966-1983) and with orbits involving partial magnetospheric shielding, may be estimated. A synoptic background review is given, followed by a detailed discussion of the model's analytic development. Also given are comments on the model's use, errors, uncertainties, and limitations, including sample calculations which demonstrate the application of specific or general project missions. Finally, for circular trajectories, percentage exposure maps are presented, depicting fractional mission times spent outside particular L-shells as functions of orbit altitude and inclination.
Document ID
19730022037
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Stassinopoulos, E. G. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
King, J. H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 2, 2013
Publication Date
December 1, 1972
Subject Category
Space Radiation
Report/Patent Number
NASA-TM-X-70433
X-601-72-489
Accession Number
73N30769
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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