A numerical study of the composite surface model for ocean scattering

A numerical study of ocean backscattering for surfaces rough in two dimensions is presented. The numerical model is based on Monte Carlo simulation using the sparse matrix-flat surface iterative approach with canonical grid (SMFSIA/CAG), which is a more efficient version of the method of moments that allows large two dimensional surfaces to be treated. Backscattering cross sections are illustrated for perfectly conducting power law spectrum ocean surface models at angles from 0 to 60 degrees from normal incidence. Variations with surface spectrum low frequency cutoff (ranging over spatial lengths from 64 /spl lambda/ to 2 /spl lambda/) are investigated, and demonstrate the accuracy of the composite surface model.

[1]  C. Swift,et al.  An improved model for the dielectric constant of sea water at microwave frequencies , 1977 .

[2]  Ronald Raymond Lentz.  A numerical study of electromagnetic scattering from ocean-like surfaces , 1974 .

[3]  P. Beckmann,et al.  The scattering of electromagnetic waves from rough surfaces , 1963 .

[4]  Alexander G. Voronovich.  A two-scale model from the point of view of the small-slope approximation , 1996 .

[5]  W. L. Jones,et al.  Aircraft measurements of the microwave scattering signature of the ocean , 1977 .

[6]  Harold Guthart,et al.  Numerical simulation of backscatter from linear and nonlinear ocean surface realizations , 1991 .

[7]  Adrian K. Fung,et al.  Numerical simulation of scattering from simple and composite random surfaces , 1985 .

[8]  Stephen L. Durden,et al.  A numerical assessment of rough surface scattering theories: Horizontal polarization , 1992 .

[9]  Leung Tsang,et al.  Monte-Carlo simulations of large-scale problems of random rough surface scattering and applications to grazing incidence with the BMIA/canonical grid method , 1995 .

[10]  G. Brown,et al.  Backscattering from a Gaussian-distributed perfectly conducting rough surface , 1978 .

[11]  A. Fung,et al.  Numerical computation of scattering from a perfectly conducting random surface , 1978 .

[12]  Akira Ishimaru,et al.  Backscattering enhancement of electromagnetic waves from two-dimensional perfectly conducting random rough surfaces: a comparison of Monte Carlo simulations with experimental data , 1996 .

[13]  Merril I. Skolnik,et al.  Introduction to radar systems /2nd edition/ , 1980 .

[14]  C. Macaskill,et al.  Numerical evaluation of the statistics of acoustic scattering from a rough surface , 1988 .

[15]  Joel T. Johnson,et al.  Backscattering enhancement of electromagnetic waves from two-dimensional perfectly conducting random rough surfaces based on Monte Carlo simulations , 1995 .

[16]  On the theory of /spl Delta/k radar observations of ocean surface waves , 1995 .

[17]  J. Apel.  An improved model of the ocean surface wave vector spectrum and its effects on radar backscatter , 1994 .

[18]  M. Skolnik,et al.  Introduction to Radar Systems , 2021, Advances in Adaptive Radar Detection and Range Estimation.

[19]  G. J. St-Cyr,et al.  A radar ocean imaging model for small to moderate incidence angles , 1986 .

[20]  D. Jackson,et al.  The validity of the perturbation approximation for rough surface scattering using a Gaussian roughness spectrum , 1988 .

[21]  A. K. Fung,et al.  A numerical study of the regions of validity of the Kirchhoff and small‐perturbation rough surface scattering models , 1988 .

[22]  A. Fung.  Microwave Scattering and Emission Models and their Applications , 1994 .

[23]  Charles L. Rino,et al.  Application of beam simulation to scattering at low grazing angles: 2. Oceanlike surfaces , 1994 .

[24]  S. Rice.  Reflection of electromagnetic waves from slightly rough surfaces , 1951 .

[25]  Stephen L. Durden,et al.  A numerical study of the separation wavenumber in the two-scale scattering approximation [ocean surf , 1990 .

[26]  R. E. Collin,et al.  Full wave theories for rough surface scattering: An updated assessment , 1994 .

[27]  J. Kong,et al.  Theory of microwave remote sensing , 1985 .

[28]  J. Wright.  A new model for sea clutter , 1968 .

[29]  D. Milder,et al.  An improved formalism for rough-surface scattering. II: Numerical trials in three dimensions , 1992 .

[30]  E. Thorsos,et al.  Acoustic scattering from a ‘‘Pierson–Moskowitz’’ sea surface , 1989 .

[31]  Akira Ishimaru,et al.  Monte Carlo simulations of large-scale composite random rough-surface scattering based on the banded-matrix iterative approach , 1994 .

[32]  G. Valenzuela,et al.  Depolarization of EM waves by slightly rough surfaces , 1967 .

[33]  Akira Ishimaru,et al.  Scattering from very rough surfaces based on the modified second‐order Kirchhoff approximation with angular and propagation shadowing , 1990 .