Informative characters in spectral-polarization images of backscattering from surface objects

The frequency, spectral and polarization features of the signals scattered by transportation (wheeled, caterpillar) and biological objects (person, animals, birds) are studied with coherent radar in pulse and CW modes in wave bands 10 cm, 3cm, 8 mm, 4mm and 2mm. It´s showed that Doppler spectrum of signals scattered by person contains dominant line which corresponds to velocity of target and pedestal (below the line at -10÷ -15 db ) caused by secondary phase modulation due to fine structure of target movement. In the case of transportation the pedestal is of ruled structure due to vibrations of the target. The characteristics of signals scattered that presented in the paper are of interest for target detection and recognition