Large scale 6300 A, 5577 A, 3914 A dayside auroral morphology

Details Large scale 6300 A, 5577 A, 3914 A dayside auroral morphology Large scale 6300 A, 5577 A, 3914 A dayside auroral morphology

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980georl...7..239m&link_type=abstract

Geophysical Research Letters, vol. 7, Apr. 1980, p. 239-242. National Research Council of Canada

Physics

5

Auroral Spectroscopy, Electron Precipitation, Energetic Particles, Isis Satellites, Light Emission, Proton Precipitation, Boundary Layer Plasmas, Daytime, Flight Conditions, Geomagnetic Latitude, Spectrophotometry

Scientific paper

Using observations of the ISIS-2 satellite, the instantaneous relationship between 6300 A, 5577 A, and 3914 A emissions in the entire noon sector is examined with regard to the two-dimensional morphology of auroras. Substantial soft precipitation emission is found to occur on closed field lines, and the location of the most intense 6300 A emission appears to be unrelated to the 'gap' in 5577 A and 3914 A emissions. Poleward of the more energetic precipitation which causes the discrete 5577 A and 3914 A features, there is no obvious 6300 A signature of direct entry particles. In addition, large differences in morphology and intensity apparently exist between wavelengths in dayside auroras due to different source regions for the precipitating particles.

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