ANGEO Annales Geophysicae ANGEO Ann. Geophys. 1432-0576 Copernicus Publications Göttingen, Germany 10.5194/angeo-20-13-2002 Assessing the contamination of SuperDARN global convection maps by non-F-region backscatter Chisham G. 1 2 Pinnock M. 2 1 British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge, CB3 0ET, UK Correspondence to: G. Chisham (G.Chisham@bas.ac.uk) 31 01 2002 20 1 13 28 Copyright: © 2002 G. Chisham 2002 This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/ This article is available from https://angeo.copernicus.org/articles/20/13/2002/angeo-20-13-2002.html The full text article is available as a PDF file from https://angeo.copernicus.org/articles/20/13/2002/angeo-20-13-2002.pdf

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.<br><br><b>Key words. </b>Ionosphere (plasma convection) – Radio science (radio wave propagation; instruments and techniques)