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GeoSwath ROV/AUV Swath Bathymetry

GeoSwath mounted on Minerva ROV shown with 500kHz ROV transducersIntroduction

GeoSwath ROV/AUV is a wide swath bathymetric sonar designed as a payload sonar on survey class remotely operated vehicles (ROV's) and autonomous underwater vehicles (AUVs).  The robust and compact GeoSwath ROV/AUV is suitable for integration on most vehicle sizes.  It provides co-registered swath bathymetry and side scan data over a very wide swath, giving accurate high resolution charts and images of the seafloor.  The data can be processed in GeoTexture software to give bottom classification and texture analysis.

General Description

GeoSwath ROV/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.

GeoSwath ROV/AUV is available in three frequency versions: 125, 250 and 500kHz.  It maintains the same high accuracy of bathymetric survey as seen in the GeoSwath Plus, with the advantages of being able to operate via the umbilical in the case of ROV's or autonomously for AUV's.

GeoSwath module on Gavia AUV (one of the two 500kHz transducers is visible)System Capabilities

GeoSwath ROV/AUV  can collect data for bathymetric mapping, along with co-registered true digital side scan data, in water depths up to 200 metres under the transducers.  GeoSwath ROV/AUV offers wide swath coverage of up to 12 times water depth, to a maximum swath width of 780 metres.

GeoSwath ROV/AUV requires inputs from sound velocity, heading, position and motion sensors, these can either be from the vehicle's existing sensor package or GeoAcoustics can offer a complete range of recommended sensors.  The GeoSwath ROV/AUV software can integrate all ancillary data from the vehicle sensors either in real-time over Ethernet or during post processing using time-stamped data.

GeoSwath ROV/AUV Post Processing

The GeoSwath ROV/AUV post processing software provided with the system is a fully functional data processing toolset, including:

  • Integration of ancillary data (via time stamp).
  • Inspection and editing of sonar and ancillary data.
  • Generation and filtering of fully corrected swath and side scan data.
  • Gridding and mosaicing.
  • 2D and 3D visualisation (including fly-through).
  • Output of raw data, bathymetry grids, side scan mosaics and combined products.

GeoSwath ROV Operation

The GeoSwath ROV electronics module and transducers are easily installed on most ROV platforms, requiring only power and an Ethernet connection for communications.  Survey data can be stored locally on the ROV using the GeoSwath ROV hard drive or transmitted to the surface in real time via the umbilical cable, or both.  Where data is transmitted to the surface in real time all the acquisition display features of the GeoSwath Plus system are available to the user.

GeoSwath AUV Operation

Autonomous AUV operation can be achieved either by command from the AUV mission control computer, or using pre-set parameter files loaded prior to start of mission.  After AUV retrieval the data is downloaded via Ethernet to the GeoSwath AUV shore processing computer for data editing, post processing, and chart generation.

Detailed Specification

Download Data Sheets & Downloads