Physics
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992itps...20..726e&link_type=abstract
IEEE Transactions on Plasma Science (ISSN 0093-3813), vol. 20, no. 6, p. 726-739.
Physics
2
Auroral Zones, Magnetic Signatures, Magnetosphere-Ionosphere Coupling, Plasma Dynamics, Polar Cusps, Solar Terrestrial Interactions, Daytime, Electron Emission, Greenland
Scientific paper
The height distribution of the day-side cusp aurora and the relation between optical emissions and net downward energy flux are examined. These quantities are evaluated on the basis of coordinated auroral observations at Svalbard and Greenland, together with simultaneous overhead F-9 satellite measurements. For quiet conditions, auroral altitudes near 350 km are found to fit the observations best. This is roughly 100 km higher than normally assumed. Only during events when the green auroral line dominated did the height of the 630 nm decrease to 250 or even below. Within the soft particle regions, where the average energy was less than 250 eV, a conversion factor of approximately 5 kR per 0.001/W sq m was obtained. These findings are discussed in relation to day-side cusp auroral characteristics and the main sources for these optical emissions.
Carlson Herbert C.
Denig William F.
Egeland A. A.
Fukui Katsura
Weber Eric
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