A polarimetric ultra-wide band field scatterometer

"TERESA" (TErrestrial Radar Equipment for Scattering Analysis) is a ground-based, fully polarimetric scatterometer operative in the S, C, X, and Ku bands. It has been designed to obtain the complete backscattering matrix of terrain and oceanographic surfaces with extensive information of its variation with frequency and incident angle. The system is able to measure the Doppler spectrum of the illuminated scene as well. The paper briefly describes the specifications and structure of the system and the first results obtained.