Computer Science – Sound
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94.6713s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 94, June 1, 1989, p. 6713-6722. Research supported by DNA.
Computer Science
Sound
37
Auroras, Electrodynamics, Ionospheric Currents, Polar Cusps, Satellite Sounding, Space Plasmas, Birkeland Currents, Electron Energy, Electron Precipitation, Magnetopause
Scientific paper
The HILAT-satellite magnetic-field and electron-precipitation measurements and ground-based photometric observations of the polar cusp ionospheric structures were combined to provide information on electrodynamics of the polar cusp ionosphere. Magnitudes of Birkeland currents, Poynting flux, height integrated Pedersen conductivity, and Joule heat dissipation rate were derived. Birkeland current densities of about 10 microA/sq m, intermediate-scale (tens of kilometers) structures of enhanced electron precipitation, and strong northward electric fields (with peak values of about 200 mV/m) were observed. The satellite pass occurred within an interval characterized by a series of poleward moving auroral structures, each appearing at the cusp equatorward boundary. The auroral forms were dominated by red oxygen emission.
Bythrow Peter F.
Egeland A. A.
Jacobsen Bob
Lybekk Bjørn
Sandholt Per Even
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