Other
Scientific paper
Jan 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979georl...6...21b&link_type=abstract
Geophysical Research Letters, vol. 6, Jan. 1979, p. 21-24.
Other
41
Atmospheric Electricity, Earth Magnetosphere, Electric Fields, Interplanetary Magnetic Fields, Polar Caps, Auroral Zones, Convection, Magnetic Field Configurations, Polar Orbits, Satellite Observation, Solar Wind
Scientific paper
Polar cap electric fields patterns are presented from times when the S3-2 satellite was near the dawn-dusk meridian and IMF data were available. With the z-component greater than or equal to 0.7 gamma, two characteristic types of electric field patterns were measured in the polar cap. In the sunlit polar cap the convection pattern usually consisted of four cells. Two of the cells were confined to the polar cap with sunward convection in the central portion of the cap. The other pair of cells were marked by anti-sunward flow along the flanks of the polar cap and by sunward flow in the auroral oval. These observations are interpreted in terms of a model for magnetic merging at the poleward wall of the dayside polar cusp. The second type, which was observed in some of the summer hemisphere passes and all of the winter ones, was characterized by an electric field pattern which was very turbulent, and may be related to inhomogeneous merging.
Burke William J.
Kelley Michael C.
Lai Shan T.
Sagalyn R. C.
Smiddy Michael
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