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The variation of solar proton energy spectra size distribution with heliolongitude (1974)

Masung, L. S. ; Vanhollebeke, M. A. I. ; Mcdonald, F. B.

In: CASI

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Publication Date: 2019-06-27

Description: A statistical study of the initial phases of 185 solar particle events was carried out using the data from cosmic ray experiments on IMP 4 and IMP 5. Special emphasis was placed on the identification of the associated solar flare, as the parent flare can be determined for 68% of the events. It appears probable that most of the unidentified increases occur on the non-visible disc of the sun. The existence of a 'preferred-connection' longitude between 20 W and 80 W was established by examining the heliolongitude of all the flare associated events. It is demonstrated that the energy spectra determined at the time of maximum particle in the 20 to 80 MeV or 4 to 20 Mev interval range give results identical to that obtained by the 'distance-travelled' method.

Keywords: SPACE RADIATION

Type: NASA-TM-X-70770 , X-660-74-298

Format: application/pdf

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