Instantaneous pictures of the high-latitude electrodynamics using Viking and DMSP/F7 observations

Details Instantaneous pictures of the high-latitude electrodynamics using Viking and DMSP/F7 observations Instantaneous pictures of the high-latitude electrodynamics using Viking and DMSP/F7 observations

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987esasp.270...45m&link_type=abstract

In ESA, Proceedings of the 8th ESA Symposium on European Rocket and Balloon Programs and Related Research p 45-50 (SEE N88-16201

Physics

Auroras, Dmsp Satellites, Electrohydrodynamics, Polar Regions, Satellite Observation, Swedish Space Program, Electric Fields, Equipotentials, Field Aligned Currents, Ionospheric Conductivity, Plasma Drift, Ultraviolet Photography

Scientific paper

Simultaneous observations by the Viking and the DMSP/F7 satellites were applied to a technique to obtain realistic pictures of the auroral electrodynamics. An instantaneous global equipotential pattern is calculated using field-aligned current and conductivity distributions that are qualitatively consistent with the Viking auroral imager data, and quantitatively consistent with magnetic field and particle data from the two satellites. This convection pattern agrees with the E x B-drift vectors estimated from Viking electric field data. Discrepancies consistent with upward parallel electric fields occur in regions of upward currents. The pattern is of the normal two-cell type, with a small dusk cell and a large, elongated crescent-shaped dawn cell. The excellent agreement between the satellite and model data demonstrates the reliability of the results.

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