Synthetic Aperture Sonar
JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB
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The report discusses synthetic-aperture imagery applied to the Seabed Treaty verification problem. It presents the basic theory of the synthetic- aperture side-looking sonar and shows the transition region from real to synthetic aperture in terms of resolution and mapping rate. Considerable engineering and detailed design work will be required to perfect the synthetic- aperture technique. In addition, the form and character of ocean bottom structures housing potential threats and their possible locations must be defined so that the image makers can intelligently develop discriminators and judgment tools. Considerable attention is paid in the report to the signal- processing problem and output display. The paper also discusses development costs, normal development schedules, critical technical areas, critical medium stability experiments, characteristics of possible demonstration hardware, and the state of the art of precise navigation at sea.
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