Challenges in Seafloor Imaging and Mapping with Synthetic Aperture Sonar

Conference: EUSAR 2010 - 8th European Conference on Synthetic Aperture Radar
06/07/2010 - 06/10/2010 at Aachen, Germany

Proceedings: EUSAR 2010

Pages: 4Language: englishTyp: PDF

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Hansen, Roy E.; Callow, Hayden J.; Sæbø, Torstein O.; Synnes, Stig A. V. (Norwegian Defence Research Establishment (FFI), PO Box 25, 2027 Kjeller, Norway)

The success of synthetic aperture sonar (SAS) is critically dependent on overcoming several challenges. The sonar has to be positioned with accuracy better than a fraction of a wavelength along the synthetic aperture. The ocean environment, and particularly the sound velocity, has to be accurately estimated for successful focusing of SAS images. For nonstraight synthetic apertures, the bathymetry of the scene to be imaged must be known. Kongsberg Maritime and FFI have developed the HISAS 1030 wideband widebeam interferometric SAS. This paper describes the system and show example results from data collected by a HUGIN 1000-MR autonomous underwater vehicle.