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© GeoAcoustics 2008
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GeoSwath AUV Swath Bathymetry for Gavia
Introduction
GeoSwath AUV provides the Gavia with the capability to collect co-registered swath bathymetry and side scan data over a very wide swath, enabling the production of accurate high resolution charts and images of the seafloor. As an option the data can also be processed in GeoTexture software to give bottom classification and texture analysis. General Description GeoSwath AUV is a PC based wide swath bathymetry system offering state of the art performance . Based on the successful bathymetric sonar technology used in the boat mounted GeoSwath Plus, the design emphasis has been to minimise size and power requirement in order to enable full sonar capabilities on a self-powered autonomous platform. The GeoSwath AUV maintains the same high accuracy of bathymetric survey as seen in the GeoSwath Plus, with the advantage of being able to operate autonomously by command from the AUV mission control computer. Fully Integrated Solution The Gavia AUV is a fully modular, small torpedo shaped vehicle capable of diving down to 2000 metres with long endurance underwater. The GeoSwath AUV has been integrated into a 400mm long modular section of the Gavia vehicle, with 500kHz transducers mounted on the module's hull.
System Capabilities GeoSwath AUV (500kHz) can autonomously collect data for bathymetric mapping, along with co-registered true digital side scan data, in water depths up to 50 metres under the transducers with a wide swath coverage of up to 12 times water depth, to a maximum swath width of 190 metres. After AUV retrieval, the data is downloaded via Ethernet to the GeoSwath AUV shore processing computer for data editing, post processing, and chart generation. The result is high resolution bathymetry and co-registered side scan data, enabling full mapping of the sea floor along with feature identification and optional texture classification. GeoSwath AUV Post Processing The GeoSwath AUV post processing software is a fully functional data processing toolset, including:
GeoTexture software, for texture mapping and classification of the GeoSwath side scan data is available as an optional extra.
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GeoSwath
AUV is a wide swath bathymetric sonar designed as a payload sonar on survey
class autonomous underwater vehicles (AUVs). The robust and compact GeoSwath
AUV is suitable for integration on most vehicle sizes. This page
describes the GeoSwath AUV integration into the Gavia AUV from Hafmynd Ltd.
