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© GeoAcoustics 2008
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GeoSwath Plus Swath Bathymetry
Introduction GeoSwath Plus provides very efficient multibeam swath bathymetry and side scan mapping for all survey applications; the same area can be mapped 30% to 40% faster using GeoSwath Plus than with a typical beamforming multibeam echosounder. GeoSwath Plus offers ultra high resolution, accurate and repeatable seafloor bathymetry, with the added bonus of simultaneous true side scan data. The seafloor coverage provided by GeoSwath Plus is up to 12 times the water depth, and can be even greater than this in very shallow water.
Software Operating on Windows XP, the GeoSwath Plus software package provides a complete turnkey solution, including:
As an option GeoSwath side scan data can be analysed using GeoTexture, our software for Side Scan Sonar Image Processing, Mosaicing, Texture Mapping and Classification which provides users with more information about the seafloor than can be obtained using conventional multibeam echosounders. Interfaces also exist to a wide variety of 3rd party software. GeoSwath Plus data can also be interfaced to third party implementations of the CUBE algorithms.Hardware GeoSwath Plus is a compact and lightweight system. The 19 inch rack mountable workstation contains the system electronics as well as the acquisition and processing PC. All peripheral sensors (motion, heading, transducer face sound velocity, sound velocity profiler, position & tide) interface directly to the workstation. The transducers are small and can be either hull mounted or installed over the side on vessels of opportunity. There are two versions for vessel mounting with operating frequencies of 125 kHz and 250 kHz. There is also a 500 kHz version for mounting on AUV’s and ROV’s. Installation The hardware has been designed to make it ideal for small boat operation. GeoSwath Plus is regularly installed on vessels of opportunity in less than 4 hours. Over the side mount, bow mount, temporary or permanent installation, large or small vessels, GeoSwath Plus is suitable for all eventualities Performance GeoSwath Plus provides ultra high resolution bathymetry data which meets or exceeds the Special Order specifications, as set out in IHO Standards for Hydrographic Surveys, Special Publication 44, 4th Edition, April 1998. Simultaneously recorded true side scan data extends the capabilities of the system. The bathymetry and side scan data sets can also be processed in parallel which provides a powerful combination for interpretation of the survey dataset.
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