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Interplanetary proton (0.61 < E p < 3.41 MeV) events observed with Pioneer 11, 1973–1986 and out to 22.4 AU

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Abstract

A survey of interplanetary proton (0.61 < E p < 3.41 MeV) events is summarized in graphical and tabular form for the period April 1973–December 1986. The observations were obtained by an effectively continuous data stream from the University of Iowa instrument on the Ames Research Center/NASA spacecraft Pioneer 11 as it moved outward in the solar system from 1.0 to 22.4 AU. Two hundred and sixty-five distinct events are identified. The spectra and intensities of the protons, presumed to be originally of solar origin, are influenced dramatically by propagative and accelerative processes in the interplanetary medium.

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Authors and Affiliations

  1. University of Iowa, 52242, Iowa City, IA, U.S.A.

    James A. Van Allen

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  1. James A. Van Allen
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Van Allen, J.A. Interplanetary proton (0.61 < E p < 3.41 MeV) events observed with Pioneer 11, 1973–1986 and out to 22.4 AU. Sol Phys 112, 165–179 (1987). https://doi.org/10.1007/BF00148496

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  • DOI: https://doi.org/10.1007/BF00148496

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