Physics
Scientific paper
Sep 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.1995o&link_type=abstract
Geophysical Research Letters (ISSN 0094-8534), vol. 20, no. 18, p. 1995-1998.
Physics
1
All Sky Photography, Auroral Arcs, Satellite Imagery, Stereophotography, Azimuth, Data Reduction, Particle Energy, Zenith
Scientific paper
Simultaneous measurements of auroral intensities from below and above the emitting layer can be used to verify imager orientation and mapping procedures for satellite auroral images, determine auroral height by stereoscopic methods, and deduce incident particle characteristics. A data reduction approach that achieves optimal spatial and temporal matching of ground and space data sets is presented. We investigate a January 25, 1987, case study of a bright auroral arc using a meridian scanning photometer and an all-sky camera located at Rabbit Lake, Saskatchewan, and a space imager (AIRS of Polar BEAR). The ground and space latitudinal profiles of arc intensity match best for a peak deposition height of 122 +/- 7 km. Theoretical calculations indicate that the observed FUV intensities are due to electrons of average energy 3.1 +/- 1.1 keV and a total energy flux of 5.7 +/- 1.5 ergs/sq cm s.
Eastes Richard Wayne
McEwen Don J.
Oznovich I.
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