Tuesday, 7 August 2007
Halls C & D (Cairns Convention Center)
This study presents some preliminary results of atmospheric flow around a single-doppler radar located in a real site of South Korea. The use of doppler radar in meteorological field of wind engineering has become widespread over the last several decades, but it has generally been recognized that the single-doppler radar yields only one single velocity component - the radial velocity(Vr) so that some additional hypotheses or simplifications must be necessary to get proper wind forecast. Therefore, in order to get an accurate radial velocity(Vr) in this study, the existing methods such as VAD(Velocity Azimuth Display), VARD(Velocity Area Display) and VVP(Volume Velocity Processing) method are reformulated and applied to match the previous study(Waldteufel, 1978), which have been an important indicator for retrieving a radar velocity. The results presented in this study include preliminary comparison between measurements and simulations using different methods. Unless the existing method can consider the proper decomposition of radial velocity in the real site, then authors suggest an algorithm to decrease the uncertainty errors by changing a grid adaptation rate or applying a weighting function with respect to the wind angle.
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