Synthetic aperture sonar in turbulent media

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Abstract
A method of synthetic aperture sonar imaging that is effective even in turbulent media is proposed. Signals received at a fixed point on a scanning plane are used as reference signals, and the averaging effect is applied in the process of aperture synthesis to obtain stable images within the same scanning time as conventional methods. The principle and some considerations about the quality of the obtained images are shown, and typical examples derived by computer simulation are given. The results show the effectiveness of the method, and suggest that temporal and spatial correlation lengths of turbulence are the principal factors that dominate the effectiveness.

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