Statistical Non-Gaussian Model of Sea Surface With Anisotropic Spectrum for Wave Scattering Theory. Part Ii - Abstract

• Published in: Journal of electromagnetic waves and applications Vol. 13; no. 7; pp. 901 - 902
• Main Authors: Tatarskii, V.I., Tatarskii, V.V.
• Format: Journal Article
• Language: English
• Published: Zeist Taylor & Francis Group 01.01.1999; VSP
• Subjects: Applied classical electromagnetism; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electromagnetic wave propagation, radiowave propagation; Electromagnetism; electron and ion optics; Electron states; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Methods of electronic structure calculations; Physics; Radar cross-sections; Cross section; Random surface; Kirchhoff law; Wave scattering; Theoretical study; Wind velocity; Sea surfaces; Reflecting surface
• ISSN: 0920-5071; 1569-3937
• DOI: 10.1163/156939399X00394

In part I of this paper we analyzed which statistical properties of a random surface are necessary to describe a wave-scattering cross section from such a surface. We develop amathematical model of a sea surface that allows us to find a scattering cross section. In part II of this paper, we calculate in the Kirchhoff approximation scattering from a perfectly reflecting rough surface, having non-Gaussian PDF of slopes and an anisotropic spectrum (they correspond to experimental data for wind-driven waves on the water's surface). In the Kirchhoff approximation we obtained significant differences between Gaussian and non-Gaussian cases with the same spectrum, especially in the range of small grazing angles. The azimuthal dependence of the radar cross-section highly depends on the wind speed. It was found that the ratio of radar cross sections in upwind and crosswind directions strongly depends on the wind speed and can serve as a method of measuring this value.