Year-end Sale % OFF 
Abstract
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.
Highlights
Spaced antenna (SA) radar techniques have been used for the estimation of atmospheric wind velocities for over 60 years
The results of the short-term (2-min) and longer term comparisons suggest that the imaging Doppler interferometry (IDI) winds are approximately 10% larger than the full correlation analysis (FCA)-large winds
Reanalysis of a 14-day data set without the use of a radial velocity threshold yields IDI winds are that approximately 35% larger than the FCA-large winds, suggesting that the IDI winds are overestimated as predicted by volume scatter arguments
Summary
Spaced antenna (SA) radar techniques have been used for the estimation of atmospheric wind velocities for over 60 years. Adams et al, 1985; Meek and Manson, 1987; Franke et al, 1990) These analyses use cross-spectral phase information resulting from Doppler sorting to locate discrete scattering positions for each Doppler frequency, and combine the scattering positions and Doppler frequency information to determine the 3-D wind velocity. Briggs (1995) used the FCA theoretical model to investigate the imaging interferometric analyses in the volume scatter situation. These investigations suggested that the effective scattering positions estimated by imaging interferometry in the volume scatter situation lie along a line, and approach the zenith as the. The volume scatter predictions of Briggs (1995) were further confirmed using a radar backscatter simulation model (e.g. Holdsworth and Reid, 1995b). The results presented in this paper represent the longest term comparison of IDI with any alternative wind estimation technique to date, far exceeding the four-month Dynasonde-IDI and meteor wind comparisons of Jones et al (2003)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
