Physics
Scientific paper
Jun 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.1323c&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 12, p. 1323-1326.
Physics
23
Atmospheric Ionization, Energetic Particles, High Energy Electrons, Imaging Spectrometers, Magnetic Storms, X Ray Imagery, Auroral Zones, Environmental Monitoring, Solar X-Rays, Upper Atmosphere Research Satellite (Uars)
Scientific paper
The Atmospheric X-ray Imaging Spectrometer (AXIS) of the Particle Environment Monitor investigation aboard the Upper Atmosphere Research Satellite monitors energy input to the upper atmosphere due to energetic electrons. Analysis of the AXIS data from the major geomagnetic storm of 8-9 November 1991 is presented. During the November storm, electrons above a few keV flowing into a substantially expanded auroral zone provided the bulk of the ionizing power to the upper atmosphere. At the peak of the disturbance the total AXIS-observed power reached 40 GW. On 9 November the whole day average atmospheric ionization rate in the auroral zone at 80 km altitude exceeded the rate due to solar UV and solar X-rays by a factor of over 10 to 100.
Chenette D. L.
Datlowe Dayton W.
David Winningham J.
Robinson Richard M.
Schumaker Timothy L.
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