Physics
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.2431b&link_type=abstract
Journal of Geophysical Research, vol. 87, Apr. 1, 1982, p. 2431-2443.
Physics
84
Auroral Arcs, Electric Fields, Magnetic Fields, Polar Caps, Auroral Electrojets, Birkeland Currents, Coupling, Earth Ionosphere, Earth Magnetosphere, Field Aligned Currents, Flux (Rate), Interplanetary Magnetic Fields, Magnetopause
Scientific paper
A description is presented of a set of electric field, magnetic field, and electron flux simultaneous measurements taken by the U.S. Air Force satellite S3-2 over the polar caps during periods when the interplanetary magnetic field (IMF) had a northward component following a period of moderate magnetospheric activity. During the winter polar cap pass the dawn-dusk component of the electric field was found to be highly irregular and five events in the polar cap with characteristics of field-aligned currents were identified from variations of the transverse magnetic field component. A comparison with electric field measurements showed that the regions of upward Birkeland currents were embedded in regions of negative space charge.
Burke William J.
Gussenhoven Susan M.
Hardy David A.
Kelley Michael C.
Rich Frederic J.
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