Wind influence on sea radar backscattering intensity

This paper presents the wind influence on sea radar backscattering intensity. The remote radar methods are widely applied to the oceanographic investigations for the estimation of the state of surface and near-surface layer over scattered signal characteristics. The main characteristic of scattered signal is the intensity, which is characterized by normalized radar cross-section (RCS). The normalized RCS also essentially depends on the wavelength and polarization of the radar signal as well as on the angle of sea surface irradiation. The estimation for normalized sea RCS have been obtained for sounding signal wavelength from 2 to 200 mm, near-surface wind velocities from 5 to 40 m/s and incidence angles from 30 to 85°. The dependence of the backscattering intensity from the operating wavelength is practically absent. The normalized RCS changes on less than 10 dB for wavelength changing by a factor of 25 in a wind velocity range from 5 to 40 m/s. This is explained by a selected model of the spatial spectrum.