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Polarimetric Doppler Weather Radar by V. N. Bringi

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4    Dual-polarized wave propagation in precipitation media

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Attenuation caused by hydrometeors, along the propagation path from the radar to the resolution volume of interest, has been studied since the beginnings of radar history (Ryde 1946; see also, the historical review by Atlas and Ulbrich 1990). The expressionfor specific attenuation was derived in (1.133d), using fairly simple concepts.The specific attenuation is, in essence, the extinction cross section of the particles weighted by the size distribution. In the microwave frequency band (<35 GHz), absorption by water along the propagation path (cloud water, raindrops, or melting hydrometeors) ...

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