منابع مشابه
Adaptive Pattern Recognition for Tornado Detection
• Students will learn how to develop a simple three layer neural network consisting of: a two node input layer, a one node output layer, and a hidden layer that connects the two and is governed by the least mean squares (LMS) algorithm. From these principles, Matlab’s neural network toolbox will then be used to design meaningful, large-scale neural networks for realistic weather radar data sena...
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The National Weather Service (NWS) Mesocyclone Detection Algorithms (MDA) use empirical rules to process velocity data from the Weather Surveillance Radar 1988 Doppler (WSR-88D). In this study Support Vector Machines (SVM) are applied to mesocyclone detection. Comparison with other classification methods like neural networks and radial basis function networks show that SVM are more effective in...
متن کاملHail Detection with Polarimetric Radar
Dual-polarization radars typically transmit horizontally and vertically polarized waves and receive polarized backscattered signals. Because illuminated hydrometeors are not spherical, their radar backscatter cross sections are not the same for the two polarizations. Hydrometeor size, shape, orientation, and thermodynamic phase can be inferred from returned signals. Polarimetric hail algorithms...
متن کاملPolarimetric Interferometry – Target Detection Applications
In this section we consider the problem of radar detection of stationary targets obscured by foliage clutter. This is a classical detection problem for which the usual solution approach is to reduce the radar centre frequency as far as possible, so minimising scattering by the foliage while hopefully maintaining a significant target response. These approaches are based on backscatter intensity ...
متن کاملUse of Combined Shear and Spectrum Width in Tornado Detection
WSR-88D operators have been trained to look for tornado signatures using base reflectivity and storm relative motion. Despite improvements stemming from the implementation of the WSR-88D network, these conventional signatures are not always evident in tornadic situations. At other times, these signatures may exist without tornadic development, even when environmental parameters appear favorable...
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ژورنال
عنوان ژورنال: Journal of Applied Meteorology
سال: 2005
ISSN: 1520-0450,0894-8763
DOI: 10.1175/jam2235.1