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【正文】 radar technique Simple Suppression of Ground Clutter Using Polarimetric Radar Techniques 23 July 02 Npol DZ (unedited) (2022 UTC) 23 July 02 Npol DZ (edited) (2022 UTC) ? Thresholds: ρhv , σ(Ψdp) 18176。Polarimetric Radar Meteorology MOTIVATION: transitioning from conventional powerbased measures of precipitation rate and coverage, to more accurate and plete dualpolarimetric estimates of precipitation types and amounts. ? SCOPE: polarimetric theory, radar design, data processing, physical interpretation, algorithms. ? OBJECTIVE: through “handson” approach with data from research radars above, learn latest methods for quantifying precipitation types and mounts. Polarimetric Rain Rate Estimation Polarimetric Radar Rain Rates vs. Rain Gauges Simplified Block Diagram Doppler Radar Antenna Example of 3D Beam Pattern ? NCAR CP2 Xband (Rinehart and Frush, 1983) More sidelobes……. The Radar Equation Refractive index and Kvalues as a function of phase and temperature Water to Ice Transition in Tropical Convection Transition across melt level is ~ 510 dBZ, as predicted by theory Conventional Doppler Radar WSR88D (NEXRAD) Doppler Velocity Spectrum Vr examples: ? Tornadic Supercell Thunderstorm: May 29, 2022 ?如何識別降水類型？ ?如何精確測量降水量？ ? 極化雷達(dá) Radar Waves, Polarization, and Scattering ?Electromagic Spectrum ?Electromagic Waves –Brief Mathematical Description ?Polarization ?Backscattering Matrix ?Covariance Matrix ?Radar observables Electromagic Spectrum Electromagic Waves: Spectrum Electromagic Waves Scattering and the Backscattering Matrix What are
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