Other
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....99.8951l&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol 99, no. A5, p. 8951-8959
Other
15
Atmospheric Models, Auroral Arcs, Birkeland Currents, Geomagnetism, Ionospheric Conductivity, Traveling Ionospheric Disturbances, Vortices, Data Reduction, Eiscat Radar System (Europe), Magnetometers
Scientific paper
A combination of incoherent scatter radar data and data from a magnetometer array complement each other in an ideal way. The magnetometer results help to distinguish between temporal and spatial fluctuations in the radar data, and the radar results provide a means to separate magnetometer-inferred equivalent currents into their Hall and Pedersen components. The technique is used to study Omega bands and leads to a better understanding of the ionospheric current structure associated with this phenomenon. In extending previous models we propose a pair of counterrotating source free ionospheric current vortices driven by field-aligned currents, an upward current centered in the luminous part of the Omega band and a downward current in the dark part with its center about 400 km west of the upward current.
Lühr Hermann
Schlegel Kristian
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