Nearly simultaneous observations of field-aligned currents and visible auroras by the Triad and Isis 2 satellites

Details Nearly simultaneous observations of field-aligned currents and visible auroras by the Triad and Isis 2 satellites Nearly simultaneous observations of field-aligned currents and visible auroras by the Triad and Isis 2 satellites

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.4425k&link_type=abstract

Journal of Geophysical Research, vol. 84, Aug. 1, 1979, p. 4425-4431. Navy-supported research; National Research Council of Can

Other

4

Auroras, Field Aligned Currents, Geomagnetism, Ionospheric Currents, Satellite Observation, Earth Observations (From Space), Luminosity, Magnetic Fields, Radiant Flux Density

Scientific paper

Magnetic field data from the Triad satellite at 800-km altitude are utilized to define the poleward and equatorward boundaries of field-aligned currents in the premidnight sector when auroral luminosity along the same meridian was scanned by another polar-orbiting satellite, Isis 2. It is found that the latitudinal boundaries of the major portion of the field-aligned currents line up very well with the auroral luminosity boundaries at both the poleward and equatorward sides of the auroral distribution. The boundary between the upward and downward field-aligned currents generally occurs at a minimum in the auroral luminosity profiles. Poleward of this minimum, the current is upward, and the aurora is characterized by the discrete auroral component with intensities at the boundary of 1-2 kR. Equatorward, in the region of the downward current, the aurora is essentially diffuse, and the auroral intensity at the boundary is 0.5-1 kR.

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