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www.ann-geophys.net/22/3829/2004/
doi:10.5194/angeo-22-3829-2004
© European Geosciences Union 2004
Comparisons of full correlation analysis (FCA) and imaging Doppler interferometry (IDI) winds using the Buckland Park MF radar
1Atmospheric Radar Systems, 1/26 Stirling St, Thebarton, South Australia, Australia
*also at: Department of Physics and Mathematical Physics, University of Adelaide, South Australia, Australia
2Department of Physics and Mathematical Physics, University of Adelaide, South Australia, Australia
Abstract. We present results from three years of mesospheric and thermospheric wind measurements obtained using full correlation analysis (FCA) and imaging Doppler interferometry (IDI) for the Buckland Park MF radar. The IDI winds show excellent agreement with the FCA winds, both for short (2-min) and longer term (hourly, fortnightly) comparisons. An extension to a commonly used statistical analysis technique is introduced to show that the IDI winds are approximately 10% larger than the FCA winds, which we attribute to an underestimation of the FCA winds rather than an indication that IDI overestimates the wind velocity. Although the distribution of IDI effective scattering positions are shown to be consistent with volume scatter predictions, the velocity comparisons contradict volume scatter predictions that the IDI velocity will be overestimated. However, reanalysis of a 14-day data set suggests the lack of overestimation is due to the radial velocity threshold used in the analysis, and that removal of this threshold produces the volume scatter predicted overestimation of the IDI velocities. The merits of using hourly IDI estimates versus hourly averaged 2-min IDI estimates are presented, suggesting that hourly estimated turbulent velocities are overestimated.
Full Article (PDF, 1264 KB)
Citation: Holdsworth, D. A. and Reid, I. M.: Comparisons of full correlation analysis (FCA) and imaging Doppler interferometry (IDI) winds using the Buckland Park MF radar, Ann. Geophys., 22, 3829-3842, doi:10.5194/angeo-22-3829-2004, 2004. Bibtex EndNote Reference Manager XML
