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Polarimetric radar signatures of precipitation at S- and C-bands

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5 Author(s)
Bringi, V.N. ; Dept. of Electr. Eng., Colorado State Univ., Fort Collins, CO, USA ; Chandrasekar, V. ; Meischner, P. ; Hubbert, J.
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Time series data were obtained from three advanced radars: the National Center for Atmospheric Research (NCAR) CP-2 radar, the National Severe Storms Laboratory's (NSSL) Cimarron radar, and the C-band Poldirad radar operated by the German Aerospace Research Establishment (DLR). Measurements of radar reflectivity, differential reflectivity ZDR, differential propagation phase φDP , and the crosscorrelation between horizontal and vertical polarised waves are derived from time series data in rain, rain mixed with ice, and in the stratiform ice phase of convective storms. Raindrops are modelled as oblate in shape with a gamma form for their size distribution. The gamma parameters (No, D o, m) are varied over an entire range encompassing a wide variety of rainfall types. The radar rain measurements are shown to be in good general agreement with the model rain simulations. By combining ZDR and φDP it is possible to identify regions of mixed particle types, e.g. raindrops and hail, or ice crystals and snowflakes

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Radar and Signal Processing, IEE Proceedings F  (Volume:138 ,  Issue: 2 )