Multi-Channel Data Acquisition for a Free-Towed Synthetic Aperture Sonar

This paper describes the data acquisition system developed for the KiwiSAS-III Synthetic Aperture Sonar (SAS), developed by the Acoustics Research Group at the University of Canterbury. This sonar system is designed to provide high resolution imagery of the seafloor in a shallow water environment. The data-acquisition system is based around a custom rack of electronics interfaced to a standard PC for data storage and display. A central design feature is the fully synchronous nature of all real-time components to ensure coherent image processing techniques can be applied to the data.

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