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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2016, Vol. 13, No. 2, pp. 67-83

Peculiarities of a modified model of spectral and energy characteristics of scattered waves considering the emitting and receiving antenna patterns for bistatic sensing of the sea surface

Yu.A. Titchenko 1 , V.Yu. Karaev 1 
1 Institute of Applied Physics RAS, Nizhniy Novgorod, Russia

Accepted: 07.03.2016
DOI: 10.21046/2070-7401-2016-13-2-67-83 

The formulas for the scattering cross section, shift and width of the Doppler spectrum of the scattered signal on anisotropic sea surface taking into account the antenna patterns of receiving and transmitting antenna were obtained in this study. The formulas obtained by the tangent plane method (Kirchhoff method) for the most general case of bistatic sensing, without limitations on the statement of the problem, except for the location of the receiving and radiating antennas in the Fraunhofer zone relative to the scattering surface. A feature of the approach is a representation of the two-dimensional characteristic function of a random variable in terms of the second statistical moments. The resulting formulas are applicable to both acoustic and electromagnetic case. Angular dependence of the spectral and energy characteristics of the scattered signal by the sea surface at different azimuthal viewing angles and at different angles of incident radiation is shown. It is shown that the spectral and energy characteristics of the signal scattered by the sea surface is completely determined by the second statistical moments of a surface that can be retrieved in the general case when selecting the desired measurement scheme.
Keywords: scattering cross section, Doppler spectrum, waves scattering, statistically rough surface, the inverse problem, theoretical model, Kirchhoff approximation, tangent plane method, slope variance, antenna pattern, bistatic scattering
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