Physics
Scientific paper
Jul 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983georl..10..573b&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 10, July 1983, p. 573-576. NSF-Navy-supported research.
Physics
13
Auroral Zones, Birkeland Currents, Geomagnetism, Interplanetary Magnetic Fields, Ionospheric Currents, Magnetic Disturbances, Solar Terrestrial Interactions, Auroral Electrojets, Current Density, Ionospheric Conductivity, Magsat Satellites, Solar Wind Velocity
Scientific paper
Magsat data were used to examine the behavior of Birkeland currents during 1100-2000 UT in consecutive orbits passing near the dawn-dusk meridian. The field was measured with a three-axis fluxgate instrument with a resolution of within 0.5 nT, with the sampling occurring every 1/16th sec. A total of 32 crossings of the Northern Hemisphere auroral zone were available for analysis. The changes in the magnetic readings were correlated more closely with variation in the IMF parameters than to the latitudinal width of the changes. Evidence was found for a relationship between the reconnection electric field and the intensity of the large-scale Birkeland current system. The total conductance of the auroral zone was calculated to be about 18.7 mhos.
Bythrow Peter F.
Potemra Thomas A.
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