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Interpretation of Polarimetric Radar Covariance Matrix for Meteorological Scatterers: Theoretical Analysis
Publisher: American Meteorological Society
Abstract: A simple model of the radar scattering by atmospheric particles is used to interpret all elements of the covariance scattering matrix. The components of the covariance scattering matrix and corresponding polarimetric ...
Beamwidth Effects on the Differential Phase Measurements of Rain
Publisher: American Meteorological Society
Abstract: Effects of beamfilling nonuniformities on the differential phase and rainfall estimation that use specific differential phase are examined. Two physical models are considered: an isolated rain cell with azimuthal dimensions ...
Assessment of Rainfall Measurement That Uses Specific Differential Phase
Publisher: American Meteorological Society
Abstract: This paper examines some effects of drop size distribution and shape on the rainfall-rate estimates obtained from the specific differential phase. An algorithm that uses exclusively the specific differential phase is ...
The Impact of Beam Broadening on the Quality of Radar Polarimetric Data
Publisher: American Meteorological Society
Abstract: The impact of beam broadening on the quality of radar polarimetric data in the presence of nonuniform beam filling (NBF) is examined both theoretically and experimentally. Cross-beam gradients of radar reflectivity Z, ...
Estimation of Melting-Layer Cooling Rate from Dual-Polarization Radar: Spectral Bin Model Simulations
Publisher: American Meteorological Society
Abstract: AbstractDiabatic cooling from hydrometeor phase changes in the stratiform melting layer is of great interest to both operational forecasters and modelers for its societal and dynamical consequences. Attempts to estimate ...
Polarimetric Signatures in Supercell Thunderstorms
Publisher: American Meteorological Society
Abstract: Data from polarimetric radars offer remarkable insight into the microphysics of convective storms. Numerous tornadic and nontornadic supercell thunderstorms have been observed by the research polarimetric Weather Surveillance ...
Estimation of Rainfall Based on the Results of Polarimetric Echo Classification
Publisher: American Meteorological Society
Abstract: The quality of polarimetric radar rainfall estimation is investigated for a broad range of distances from the polarimetric prototype of the Weather Surveillance Radar-1988 Doppler (WSR-88D). The results of polarimetric ...
The Impact of Evaporation on Polarimetric Characteristics of Rain: Theoretical Model and Practical Implications
Publisher: American Meteorological Society
Abstract: Soon, the National Weather Service?s Weather Surveillance Radar-1988 Doppler (WSR-88D) network will be upgraded to allow dual-polarization capabilities. Therefore, it is imperative to understand and identify microphysical ...
Calibration of Dual-Polarization Radar in the Presence of Partial Beam Blockage
Publisher: American Meteorological Society
Abstract: In the presence of partial beam blockage (PBB), weather radar measurements can experience significant bias that directly compromises the accuracy of the hydrologic applications. Techniques for the calibration of the radar ...
Areal Rainfall Estimates Using Differential Phase
Publisher: American Meteorological Society
Abstract: A radar polarimetric method for areal rainfall estimation is examined. In contrast to the polarimetric algorithm based on specific differential phase KDP, the proposed method does not require rain-rate estimation from KDP ...