Physics
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....9211123r&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Oct. 1, 1987, p. 11123-11132.
Physics
21
Auroras, Ground Truth, Ionospheric Currents, Polar Substorms, Satellite Observation, Southern Hemisphere, Atmospheric Turbulence, Energy Spectra, X Ray Spectra
Scientific paper
An auroral surge that produced a rapid-onset cosmic noise absorption event over the Amundsen-Scott South Pole station was studied with near-simultaneous ground-based and satellite observations. The spectrum of precipitating electrons determined from X-ray measurements could be characterized by an e-folding energy of about 11 keV and is found to be adequate to account for the cosmic noise absorption and maximum auroral luminosity recorded at South Pole. The electron precipitation region is deduced to have a latitudinal scale size of less than 100 km and to move poleward with a speed of 1-2 km/s coincident with the movement of a westward electrojet. Photometric data indicate that precipitating electron fluxes (with an energy less than 2 keV) exceeded 200 erg/sq cm s and contributed to a vertical current density of 0.017 A/cm.
Berkey Tom F.
Detrick D. L.
Gorney David J.
Mizera P. F.
Rosenberg T. J.
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