RADIO PHYSICS AND RADIO ASTRONOMY

PACS number: 94.20.ws 

Purpose: Radio wave scattering by a sound pulse in the atmosphere when wind is present is investigated theoretically.

Design/methodology/approach: The asymptotic of the scattered field in the Fresnel diffraction approximation is analyzed with Gaussian directional patterns of radiating systems.

Findings: It is shown that for small angles of backscattering the field is concentrated in a bounded area moving under the exposure of transverse wind velocity.

Conclusions: Explanation of the focusing effects dependence on wind velocity is suggested.

Key words: wave scattering, wave front, “degenerate” saddle point, focusing

Manuscript submitted 17.01.2017

Radio phys. radio astron. 2017, 22(2): 146-156

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