Characteristics of dayside 5577A and 3914A aurora

Details Characteristics of dayside 5577A and 3914A aurora Characteristics of dayside 5577A and 3914A aurora

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977georl...4..413c&link_type=abstract

Geophysical Research Letters, vol. 4, Oct. 1977, p. 413-416. National Research Council of Canada

Physics

10

Auroras, Daytime, Light Emission, Satellite Observation, Geomagnetic Latitude, Isis Satellites, Radiant Flux Density, Spectrum Analysis, Time Dependence, Visual Photometry

Scientific paper

Aurora on the dayside of the earth observed under especially favorable viewing conditions by the scanning auroral photometer on the ISIS-2 satellite show several distinctive features. Usually, but not always, a gap or discontinuity in the 5577A aurora is present through the 10.5 - 12.5 MLT sector, in the same region where the 6300A aurora typically reaches a maximum. Weak 3914A emission smoothly fills this gap in most of the passes. A persistent auroral intensity enhancement occurs between 14 and 16 MLT, which is probably related to a statistically deduced maximum in particle fluxes observed in this sector. Aurora in the morning sector at these wavelengths is wider and the poleward boundary is more irregular than in the afternoon.

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