FM-CW millimeter wave demonstrator system as a sensor of the sea surface wind vector

A small, low-cost FM-CW demonstrator system has been designed to investigate the feasibility of the application of FM-CW SAR in the field of airborne earth observation. A Ka-band backscatter model function and an algorithm for measurement of the wind vector over the water surface by this demonstrator system in the scatterometer mode have been developed. The principle considered, backscatter model and measuring algorithm proposed can be used for creating an airborne radar system for operational measurement of the sea roughness characteristics and for safe landing of an amphibious airplane on water, in particular under search and rescue missions in coastal areas.