Mathematics – Logic
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.4607m&link_type=abstract
Journal of Geophysical Research, vol. 86, June 1, 1981, p. 4607-4627.
Mathematics
Logic
40
Auroral Zones, Electron Precipitation, Geomagnetism, Polar Regions, Satellite Observation, Electron Energy, Electron Flux Density, Magnetic Effects, Meteorological Satellites
Scientific paper
An investigation is conducted regarding the electron precipitation over the polar regions during extremely quiet geomagnetic conditions, taking into account the data from five years of Defense Meteorological Satellite Program (DMSP) observations. It was found that at all times, precipitation occurred over both the northern and southern polar regions with significant intensity. The precipitating intensities were 1-2 orders of magnitude below the level for nominal, quiet auroral oval precipitations. The measured precipitating electrons were very soft, most having energies below 1 keV. The observed fluxes of low-energy electrons in the range from 50 eV to a few hundred eV were often merely the high-energy tail of an extremely soft precipitation. Electron precipitation with a most probable energy of a few keV can form a band detached from and equatorward of the morning auroral oval.
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