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Assessing the contamination of SuperDARN global convection maps by non-F-region backscatter

By Michael Pinnock and Gareth Chisham

Abstract

Global convection mapping using line-of-sight Doppler velocity data from the Super Dual Auroral Radar Network (SuperDARN) is now an accepted method of imaging high-latitude ionospheric convection. This mapping process requires that the flow measured by the radars is defined solely by the convection electric field. This is generally only true of radar backscatter from the ionospheric F-region. We investigate the extent to which the E-region and ground backscatter in the SuperDARN data set may be misidentified as F-region backscatter, and assess the contamination of global convection maps which results from the addition of this non-F-region backscatter. We present examples which highlight the importance of identifying this contamination, especially with regard to the mesoscale structure in the convection maps

Topics: Physics, Atmospheric Sciences
Publisher: European Geophysical Society
Year: 2002
DOI identifier: 10.5194/angeo-20-13-2002
OAI identifier: oai:nora.nerc.ac.uk:13180
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