Two-Scale Scattering Model: Determining the Scale Separation via Direct Numerical Simulations

The study uses Method of Moments-based numerical scattering simulations in 2D space to investigate choosing the scale separation parameter in the Two Scale scattering model for the ocean surface. The performance of the model is assessed for evaluating both the normalized radar cross section and the Doppler spectra of the scattered signals. The error maps (functions of the scale separation length and the incidence angle) show when constant-cutoff or angle-dependent approaches to separating the surface into the large- and small-scale parts are expected to work.