Abstract
The characteristics of extremely high-latitude dayside auroras are examined by using auroral TV data obtained at Godhavn, Greenland, and simultaneous DMSP particle data. Two different kinds of aurora are found near the pre-noon sector, namely (1) the polar arc: this aurora is observed during quiet periods and originates from the dayside region. It is related to about 100 eV electron precipitation or less, and (2) the polar corona: this aurora is observed during disturbed periods and the appearance latitute of this aurora is confined within a certain region about 70-80° MLAT. It is related to a few hundred eV electrons. These results suggest that the origin of the polar arc seems to be the plasma mantle or low-latitude boundary layer, and the origin of the polar corona seems to be the low-latitude boundary layer or Boundary Plasma Sheet.
Original language | English |
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Pages (from-to) | 1885-1894 |
Number of pages | 10 |
Journal | Journal of Atmospheric and Terrestrial Physics |
Volume | 58 |
Issue number | 16 |
DOIs | |
Publication status | Published - 1996 Jan 1 |
ASJC Scopus subject areas
- Environmental Science(all)
- Geophysics
- Engineering(all)
- Atmospheric Science
- Earth and Planetary Sciences(all)