The Impact of Beam Broadening on the Quality of Radar Polarimetric Data

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Agile-Beam Phased Array Radar for Weather Observations (2007, background): “For example take again the 1.5 times increase in effective beam width, a 60o change in differential phase over one degree in azimuth (such large gradients have been documented by Ryzhkov 2007), and an intrinsic cross correlation coefficient ρhv = 1 (upper value for drizzle).”
Polarimetric Signatures in Supercell Thunderstorms (2008, background): “…this case is the vertical increase in speed and veering of the storm-relative winds that occurs in right-moving supercell environments (Kumjian and Ryzhkov 2007), within which smaller raindrops that fall with smaller terminal velocities are advected farther from their source region than larger…”
The Hydrometeor Classification Algorithm for the Polarimetric WSR-88D: Description and Application to an MCS (2009, methodology): “…5 0.1, DZ(t)DR 5 0.5 dB, SNR(Z) 5 SNR(Kdp) 5 0 dB, and SNR(Zdr) 5 SNR(rhv) 5 5 dB. (25) The choice of threshold parameters in (25) was based on a theoretical analysis of the measurement errors caused by low rhv and SNR (Bringi and Chandrasekar 2001; Melnikov and Zrni c 2007) and NBF (Ryzhkov 2007).”