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Use of Polarization to Characterize Precipitation and Discriminate Large Hail
Publisher: American Meteorological Society
Abstract: We examine the utility of the correlation coefficient between linear orthogonally polarized echoes for determining precipitation type and gauging hail size. Models and measurements from pure rain coincide in predicting ...
Dependence of Reflectivity Factor—Rainfall Rate Relationship on Polarization
Publisher: American Meteorological Society
Abstract: The reflectivity factor (Z), rainfall rate (R) relationship for weather radars that probe precipitation at low elevation angles is sensitive to polarization. It is shown how to transform a relation that is valid with one ...
Estimation of Rain and Hail Rates in Mixed-Phase Precipitation
Publisher: American Meteorological Society
Abstract: Precipitation comprising rain and hail is studied. Specifically, techniques to identify and quantify such precipitation in terms of rain and hail fall rates using dual polarized radar data, are presented. Included for ...
Design of Curved Annular Diffusers
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Influence of curvature distribution and area-ratio (AR) distribution on the pressure fields within the curved annular diffuser are discussed. General guidelines for end-wall contouring to control the pressure gradients on ...
Comparison of Simulated Rain Rates from Disdrometer Data Employing Polarimetric Radar Algorithms
Publisher: American Meteorological Society
Abstract: Disdrometer data collected during three spring days, with moderate to heavy rain in the Norman, Oklahoma region are used with various polarimetric radar algorithms to simulate rain rates. It is assumed that available ...
An Examination of Propagation Effects in Rainfall on Radar Measurements at Microwave Frequencies
Publisher: American Meteorological Society
Abstract: Propagation effects in rainfall are examined at three microwave frequencies corresponding to S (3.0 GHz), C (5.5 GHz), and X (10.0 GHz) bands. Attenuation at horizontal polarization, as well as differential attenuation and ...
Error Structure of Multiparameter Radar and Surface Measurements of Rainfall. Part III: Specific Differential Phase
Publisher: American Meteorological Society
Abstract: Parts I and II of this three part paper dealt with the error structure of differential reflectivity and X-band specific attenuation in rainfall as estimated by radar and surface disdrometers. In this Part III paper we focus ...
Polarimetric Signatures in the Stratiform Region of a Mesoscale Convective System
Publisher: American Meteorological Society
Abstract: Four polarimetric measurands were collected in the stratiform region of a mesoscale convective system. The four are the reflectivity factor, the differential reflectivity, the correlation coefficient between orthogonal ...
Polarimetric Measurements in a Severe Hailstorm
Publisher: American Meteorological Society
Abstract: This study explores the utility of polarimetric measurements for discriminating between hydrometeor types with the emphasis on (a) hail detection and discrimination of its size, (b) measurement of heavy precipitation, (c) ...