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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 20, issue 1
Ann. Geophys., 20, 13–28, 2002
https://doi.org/10.5194/angeo-20-13-2002
© Author(s) 2002. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 20, 13–28, 2002
https://doi.org/10.5194/angeo-20-13-2002
© Author(s) 2002. This work is distributed under
the Creative Commons Attribution 3.0 License.

  31 Jan 2002

31 Jan 2002

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

G. Chisham and M. Pinnock G. Chisham and M. Pinnock
  • British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge, CB3 0ET, UK
  • Correspondence to: G. Chisham (G.Chisham@bas.ac.uk)

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.

Key words. Ionosphere (plasma convection) – Radio science (radio wave propagation; instruments and techniques)

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