The Backscattering from Anisotropic Turbulent Irregularities

Abstract

The problem of scattering of electromagnetic waves from anisotropic irregularities, generated by turbulence in the atmosphere, was considered in Born approximation. A valid solution is found not only for the Fraunhofer zone but also for the Fresnel zone of the antenna. In this case no limiting conditions on correlation length of refractive index irregularities appear and there are only limitations on radar range. It is shown that the scattered power, measured at the output of the receiving antenna, mainly depends on the degree of anisotropy and angular width of the antenna pattern. Received power increases with the increasing of anisotropy, but then saturates at a level which depends on the antenna parameters.