SABRE observations of structured ionospheric flows during substorm expansion phase onset

Details SABRE observations of structured ionospheric flows during substorm expansion phase onset SABRE observations of structured ionospheric flows during substorm expansion phase onset

Nov 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994angeo..12.1027b&link_type=abstract

Annales Geophysicae (ISSN 0992-7689), vol. 12, no. 10-11, p. 1027-1038

Physics

2

Auroras, Earth Ionosphere, Earth Magnetosphere, Field Aligned Currents, Magnetic Storms, Magnetohydrodynamic Flow, Phase Velocity, Plasmas (Physics), Vortices, Morphology, Spatial Distribution, Spectral Signatures

Scientific paper

The irregularity velocity patterns observed by the SABRE coherent radar at substorm expansion phase onset, which is identified by magnetometer observations of Pi2 pulsations, are occasionally highly structured. In all the examples of structured velocity patterns examined, the SABRE viewing area is located at longitudes within the inferred substorm current wedge. Three types of structured velocity regime are apparent depending on the level of magnetic activity and the position of the radar viewing area relative to the substorm enhanced currents and the Pi2 pulsation generation region.

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