Abstract:

Auroral precipation electron and proton fluxes and spectra are reviewed in the Antarctic region, those region includes auroral oval, polar cap, the south Atlantic anomaly(SAA), polar cusp/cleft. And two new auroral particle spectra are given based on recent' result of magnesphere study. One is kappa distribution spectra; the other is kappa distribution plus one or more monoenergetic electrons or ions spectra. the two kinds of particles precipation may source from magnetatil neutral sheet non adibatic region and adibatic region. And then an approximate analytic description of the energy spectrum of auroral electrons and ions at any atmosphere depth is derived for incident spectra of precipitation particles-such as Maxillian distribution; Velocity distribution; Kappa distribution; monoenergtic distribution spectra etc. These spectra transpoting in the atmosphere isillustrated vs altitude profiles.