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Pulsed-Doppler Velocity Isotach Displays of Storm Winds in Real Time
Publisher: American Meteorological Society
Abstract: First results derived from an NSSL effort to develop a real-time Plan Position Indicator (PPI) display of Doppler isotachs are described. The mean Doppler velocity is estimated for multiple range locations by measuring the ...
Receiver Bandwidth Effect on Reflectivity and Doppler Velocity Estimates
Publisher: American Meteorological Society
Abstract: Probert-Jones' radar equation assumes receiver bandwidth large compared to the reciprocal of the transmitted pulse width τ. The advent of coherent radars with precise transmitter frequencies allows consideration of receiver ...
Doppler Radar with Polarization Diversity
Publisher: American Meteorological Society
Abstract: In this note we propose a technique to uncouple the tie between unambiguous Doppler velocity and range. Transmission of orthogonally polarized waves in pairs of pulses increases a weather Doppler radar's capability to ...
Effect of Drop Oscillations on Spectral Moments and Differential Reflectivity Measurements
Publisher: American Meteorological Society
Abstract: A perturbation method is applied to spheroidal oscillating drops to determine the effect of fundamental axisymmetric oscillations on the power spectra and polarimetric measurements. It is shown that vibration magnitudes ...
Statistical Considerations in the Estimation of Divergence From Single-Doppler Radar and Application to Prestorm Boundary-Layer Observations
Publisher: American Meteorological Society
Abstract: Methods of statistical regression have been applied to single-radar radial velocity fields to map certain mesoscale (20?100 km) kinematic properties (e.g., divergence) of the convective boundary layer (CBL). Several methods, ...
Doppler Radar Observations of Momentum Flux in a Cloudless Convective Layer With Rolls
Publisher: American Meteorological Society
Abstract: Dual Doppler-radars are used to obtain momentum flux and turbulence intensities in the cloudless convective boundary-layer (CBL) containing roll vortices. Momentum flux from small scales unresolved by the radar is determined ...
Considerations for Pulse-Doppler Radar Observations of Severe Thunderstorms
Publisher: American Meteorological Society
Abstract: Data show that Doppler shift of storm echoes and the range extent of severe storm systems encompass a span exceeding the unambiguous resolving capability of centimetric radars. Echo coherency which is related to Doppler ...
Application of the SZ Phase Code to Mitigate Range–Velocity Ambiguities in Weather Radars
Publisher: American Meteorological Society
Abstract: It has been demonstrated through simulations that the SZ phase code method of mitigating range ambiguities has a performance that exceeds any other known phase-coding scheme. This paper describes an implementation of this ...
Estimating Large-Scale Vorticity Using VAD Products and Reflectivity
Publisher: American Meteorological Society
Abstract: Velocity-azimuth display (VAD) products (i.e., wind, divergence, deformations, etc.) and a Lagrangian advective scheme applied to the reflectivity factor field are jointly used to estimate vertical profiles of vorticity. ...
Clear-Air Roll Vortices and Turbulent Motions as Detected with an Airborne Gust Probe and Dual-Doppler Radar
Publisher: American Meteorological Society
Abstract: A case-study comparison is made of simultaneous airborne gust probe and dual-Doppler radar measurements of motions associated with roll vortices in the optically clear planetary boundary layer. Inter-comparison of the ...