Ground-based observations of subauroral energetic-electron arcs

Details Ground-based observations of subauroral energetic-electron arcs Ground-based observations of subauroral energetic-electron arcs

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983georl..10..557v&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 10, July 1983, p. 557-560. Research supported by the Lockheed Independent Re

Physics

3

Auroral Arcs, E Region, Electron Precipitation, High Energy Electrons, F Region, Ionization, Luminosity, Photometry, Radar Measurement

Scientific paper

On March 1, 1981 the spatial distributions of ionization and luminosity were monitored at Chatanika, AK with the incoherent-scatter radar, an all-sky television system, and meridian scanning photometers. The radar detected discrete regions of enhanced E-region ionization at subauroral latitudes, more than 3 deg equatorward of the diffuse aurora. The high-reolution all-sky television measurements at 427.8 nm showed that the luminosity pattern resembles multiple auroral arcs; they are narrow in latitudinal width and they extend from horizon-to-horizon in an east-west direction. These observations indicate the existence of a subauroral source of electron precipitation that is both narrow in latitude and extended in longitude.

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