A study of field-aligned currents observed at high and low altitudes in the nightside magnetosphere

Details A study of field-aligned currents observed at high and low altitudes in the nightside magnetosphere A study of field-aligned currents observed at high and low altitudes in the nightside magnetosphere

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988phys...37..443e&link_type=abstract

Physica Scripta (ISSN 0031-8949), vol. 37, no. 3, March 1988, p. 443-446.

Physics

1

Atmospheric Electricity, Auroras, Earth Magnetosphere, Field Aligned Currents, Ionospheric Currents, Night Sky, Atmospheric Boundary Layer, Dynamics Explorer 1 Satellite, International Sun Earth Explorer 2

Scientific paper

Field-aligned current structures on auroral field lines observed at low and high altitudes using DE 1 and ISEE 2 magnetometer, and particle data observed when the spacecraft are in magnetic conjunction in the near-midnight magnetosphere, are investigated. To minimize latitudinal ambiguity, the plasma-sheet boundary layer observed with ISEE 2 and the discrete aurora at the poleward edge of the auroral oval with DE 1 are studied. The overall current observed at highest latitudes is flowing into the ionosphere, and is likely to be carried by ionospheric electrons flowing upward. There are, however, smaller-scale current structures within this region. The sense and magnitude of the field-aligned currents agree at the two sites. The ISEE 2 data suggests that the high-latitude downward current corresponds to the high-latitude boundary of the plasma-sheet boundary layer, and may be associated with the ion beams observed there.

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