Multi-azimuth Amplitude Analysis of Sea Clutter At Low Grazing Angle#br#

At low grazing angle, the interaction of electromagnetic wave and the sea surface is more complex due to the interference, diffraction and shade effect. The non-uniform, non-Gaussian and nonlinear characteristics of sea clutter make it difficult to model. Furthermore, the characteristic difference of radar sea clutter under multi-azimuth angle increase the cognitive difficulty. To better understand sea clutter, multi-azimuth amplitude analysis of sea clutter was carried out at low grazing angle by using the airborne radar data. On the basis, the goodness of fit of sea clutter models was analyzed at different azimuth angles. The results show that the bandwidth is the narrowest at forward-looking and widest at side-looking. The sea clutter power at right-looking is larger than that at left-looking. For multi-azimuth sea clutter modeling, G0 distribution is recommended in forward -looking, and K and G Γ D are recommended in side-looking.