Numerical Simulation of Low-Altitude Wind Shears for a Terminal Doppler Weather Radar System

Yasuyoshi HORIBATA  Hiroshi OIKAWA  

IEICE TRANSACTIONS on Communications   Vol.E79-B   No.6   pp.801-809
Publication Date: 1996/06/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Weather Radar Technology)
low-altitude wind shear,  downburst,  terminal Doppler weather radar,  numerical simulation,  finite difference scheme,  

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Several major aircraft accidents have been attributed to low-altitude wind shears, which are normally caused by microbursts or gust fronts. Terminal Doppler Weather Radar (TDWR) systems are being installed near major airports for the detection of low-altitude wind shears. In order to develop a TDWR system further, low-altitude wind shears were numerically simulated in this study. The basic equations, which contain prognostic equations for air velocity, pressure, temperature, water vapor, and rainwater, were solved using a finite difference scheme. A terrain-following coordinate transformation was employed to simulate terrain effects. The simulation results are presented in this paper.