Computer Science – Sound
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988angeo...6..361b&link_type=abstract
Annales Geophysicae (ISSN 0980-8752), vol. 6, Aug. 1988, p. 361-375. Research supported by Norges Almenvitenskapelige Forsknings
Computer Science
Sound
49
Auroral Zones, E Region, Ionospheric Conductivity, Summer, Eiscat Radar System (Europe), Electron Density (Concentration), Electron Precipitation, Magnetosphere-Ionosphere Coupling, Satellite Sounding
Scientific paper
The auroral zone E-region conductivities and conductances have been studied for 7 quiet-time summer days. The Hall and Pedersen conductances are found to follow the solar zenith variations in a rather regular fashion, and empirical formulas for these conductances are obtained. The choice of proper collision frequency models is found to be of great importance when deriving the conductances, and it is argued that some of the different results presented by other authors may be due to different models of the collision frequencies. The Hall/Pedersen conductance ratios can only be used as an indicator of the energy of the precipitating auroral particles when the contribution from the background solar ionization is subtracted. When this is done, the ratio takes much higher values than previously reported.
Brekke Asgeir
Hall Chris
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