EXOS-C (OHZORA) observations of polar cap precipitations and inverted V events

T. Mukai, N. Kaya, T. Obara, M. Kitayama, A. Nishida

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1 Citation (Scopus)


By analyzing measurements of the precipitating electrons and ions obtained by the low energy particle experiment on board a semi-polar orbiting satellite EXOS-C launched in 1984, we address two issues. The first is the source of electrons forming the precipitation events observed as spike-like flux enhancements in the polar cap. Information derived from the conjugacy and the temperature is used to examine the adequacy of two possible sources, namely the plasma sheet and the solar wind. The second issue is the acceleration mechanism of the inverted V electrons in the auroral region. The quantitative model of the field-aligned acceleration formulated by Lyons is compared with the observation and a fair agreement is found.

Original languageEnglish
Pages (from-to)363-372
Number of pages10
JournalAdvances in Space Research
Issue number9-10
Publication statusPublished - 1988
Externally publishedYes

ASJC Scopus subject areas

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences(all)


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