Polarimetric Doppler Radar
Basic principles of a polarimetric Doppler radar are described in this chapter. These include formation of the transmitted EM wave by a pulsed radar, reception of the radar signal reflected from a single scatterer, and its transformation in the antenna, microwave assembly, and two receivers for orthogonally polarized components of the backscattered EM wave. Different schemes for transmission/reception (simultaneous or alternate) of the horizontally and vertically polarized EM waves are described. Derivation of the relations between electric fields, voltages, and powers associated with copolar and cross-polar components of the radar returns from a single scatterer is included as well as the definitions of the Doppler and differential phase shifts.
KeywordsPolarimetric Doppler radar Pulsed radar Polarimetric modes Timing Doppler shift Differential phase Single particle scattering
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