Quasi-Specular Scattering from the Air-Sea Interface

Scattering of electromagnetic energy by an arbitrarily roughened surface comprises a very difficult boundary value problem (Beckmann and Spizzichino, 1963; Bass and Fuch, 1978; Desanto and Brown, 1986). When the surface shape changes with both time and space, this further complicates matters. Even describing the scattering as a random process does not simplify the analysis too much and the use of numerical methods has not proven to be very useful either. This state of affairs leads to a great deal of emphasis on approximate analysis methods to yield both quantitative predictions and physical insight (Bass, et al., 1968; Valenzuela, 1978; Brown, 1985). Chapters 11 and 12 both illustrate approximate scattering methodologies and this chapter comprises yet another, namely the quasi-specular scattering approximation.

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