Physics
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.217..359p&link_type=abstract
In ESA Achievements of the Intern. Magnetospheric Study (IMS) p 359-363 (SEE N85-24544 14-46)
Physics
Auroral Electrojets, Auroras, Electric Fields, Geos 2 Satellite, Diurnal Variations, Field Aligned Currents, Magnetic Storms, Surges
Scientific paper
Fourteen different events, containing GEOS 2 electric field and groundbased data, were analyzed. In the premidnight sector large scale field pulsations are found to be associated with the passage of a convection reversal boundary across the satellite footpoint. When the footpoint is located within the westward travelling surge near midnight, a dusk-sunward field response is recorded, occasionally preceded by a tailward field excursion. This may be due to an inductive effect of a downward field aligned current or simply due to a shift of the satellite footpoint across the surge. In the morning sector impulsive field variations have only a moderate response on the ground. This suggests that the location of the satellite footpoint is different in the evening and morning sectors.
Huuskonen Asko
Pedersen Andreas
Pellinen R.
Schmidt Rudiger R.
Vallinkoski Matti
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