First observations of the temporal/spatial variation of the sub-auroral polarization stream from the SuperDARN Wallops HF radar

Details First observations of the temporal/spatial variation of the sub-auroral polarization stream from the SuperDARN Wallops HF radar First observations of the temporal/spatial variation of the sub-auroral polarization stream from the SuperDARN Wallops HF radar

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3312104o&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 12, CiteID L12104

Physics

20

Ionosphere: Midlatitude Ionosphere, Ionosphere: Electric Fields (2712), Ionosphere: Auroral Ionosphere (2704), Ionosphere: Ionospheric Storms (7949), Ionosphere: Ionospheric Irregularities

Scientific paper

In this letter we present the first two-dimensional observations of sub-auroral ion drift (SAID) variability within the sub-auroral polarization stream (SAPS) using a new mid-latitude SuperDARN radar located at Wallops Island, VA. The radar data are complemented with observations from the DMSP F15, TIMED, and NOAA-18 spacecraft to confirm that a backscatter feature observed at the equatorward edge of the auroral oval is a manifestation of SAPS/SAID. During a several hour long period on August 6, 2005, the velocity data indicate that significant changes in the SAPS flow occurred on time scales of a few minutes. The Wallops HF radar observations demonstrate that the SAPS phenomenon is a source of small-scale irregularities extending over many hours of MLT and that the electric fields associated with SAID in particular are highly variable.

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