A Statistical Study for Solar Protons and Alpha Particles

Details A Statistical Study for Solar Protons and Alpha Particles A Statistical Study for Solar Protons and Alpha Particles

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002iaf..confe.343e&link_type=abstract

IAF abstracts, 34th COSPAR Scientific Assembly, The Second World Space Congress, held 10-19 October, 2002 in Houston, TX, USA.,

Physics

Scientific paper

Using the measurements of the GOES (GOES05 to GOES10) and IMP8 satellites, the solar particle events have been studied. The data cover a time period from 1974 to 2000 i.e. two and a half solar cycles. Data from the GME instrument on the IMP8 satellite and the EPS (Particle Sensor) instrument on the GOES satellites have been analyzed. The measurements are 5 minutes averaged for GOES, and 30 minutes averaged for IMP8. The energy ranges extend from 4.7 MeV to 500 MeV for protons and 3.8 to 500 MeV for alpha particles. After the problems of intercalibration have been solved, the distributions of protons and Helium fluences have been calculated for each event. A statistical analysis of the results has been done in order to predict solar particles fluences for a given mission. Finally a comparison with the JPL 91 interplanetary proton fluence model of J. Feynman has been done (Feynman et al., J. Geophys. Res., 98, 13281, 1993).

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