Computer Science – Sound
Scientific paper
Nov 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980georl...7..929f&link_type=abstract
Geophysical Research Letters, vol. 7, Nov. 1980, p. 929-932.
Computer Science
Sound
1
Electron Precipitation, High Energy Electrons, Ionospheric Electron Density, Ionospheric Sounding, Relativistic Particles, D Region, E Region, Electron Energy, Polar Substorms, Radar Scanning
Scientific paper
The temporal evolution of the ionospheric density enhancement produced by a widespread relativistic electron precipitation (REP) has been observed with the Chatanika Radar. The REP was associated with a substorm particle energization event, and both the ionospheric absorption and density perturbation exhibited an approximately 90 min periodicity associated with the particles' longitudinal drift. A 80-keV characteristic energy for the precipitating electrons is deduced from ground-based and satellite data. At the maximum of the event, electrons deposited approximately 50 ergs/sq cm per sec in the ionosphere, producing a peak density of 500,000/cu cm at 89 km altitude. At that time the radar observed densities greater than 100,000/cu cm between 70 km and 110 km altitude and riometer absorption at 30 MHz was approximately 12 db.
Doupnik Joe R.
Foster Christopher J.
Stiles G. S.
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