Abstract
The possibility of using synthetic aperture sonar (SAS) processing techniques on a multibeam volume imaging sonar (the Buried Object Search Sonar, or BOSS) is explored. A system algorithm is developed which involves first forming several parallel synthetic apertures from a translated array oriented in the cross-track direction, then beamforming the synthetic apertures to form a fully 3D volumetric representation. The validity of the technique is verified by taking data from a subaperture of an experimental cable-guided multibeam system and applying the SAS processing string. Test targets are examined, including spheres and cylinders. The process proved quite robust, particularly considering that the system was not originally designed for SAS processing, and no sophisticated motion compensation schemes were employed. Implications for multibeam SAS processing of future AUV-based systems are discussed. [Work supported by ONR’s National Research Enterprise Internship Program, and performed at Naval Surface Warfare Center, Panama City, FL.]
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