2016-11-28 11:53:42

Multibeam Data Processing

Using CUBE Surfaces for Nautical Cartography and Dredged Measurements
This article is about the evolution of acoustic sounders imposed on Hydrographic Service’s new methodologies for the interpretation, handling and application of hydrographic information. Considering spatial resolution and high-density data acquired by multibeam echosounders (MBES), algorithms such as Combined Uncertainty Bathymetry Estimator (CUBE) are used in the processing workflow to generate depths and uncertainty estimates. Can bathymetric surfaces be considered the final survey product in exchange of the traditional shoals selection? IHPT conducted hydrographic surveys in order to evaluate CUBE processing for nautical cartography and for dredged volume calculation. Shoals validated by hydrographers were compared with CUBE estimated depths and... (read more)
2012-05-02 04:24:26

Multibeam Sonar Training Course

This comprehensive six-day course is designed to provide a theoretical and practical background in multibeam survey technology and techniques for hydrographic surveys, continental shelf boundary delimitation, offshore engineering, harbor dredging, fisheries habitat, route survey and scientific research, and provides overviews of: • the technology and problems associated with shallow water multibeam surveys,• processing and visualization techniques designed to address the complexities of swath mapping, • constraints on using swath bathymetry to produce highest quality data. (read more)
2016-09-12 11:13:49

Multibeam Water Column Imaging

Kongsberg Maritime’s new multi-beam echo sounder, EM 3002, extends the functionality of multi-beam echo sounders to cover 3D imaging of biomass and other acoustic reflectors that might be present in the water column. 160 acoustic beams are sampled digitally with a spatial resolution of 15cm for each ping, creating a digital image of a slice of the water mass under the transducer. When the ship is sailing forward, a 3D description can be obtained by combining the images from several pings. The raw display image is available as part of the operator interface. An option to the SIS operating software... (read more)
2005-01-20 12:00:00

Multibeam Sonar Training Course

The 51st UNB-OMB / UNH-CCOM Multibeam Sonar Training Course, co-hosted by the Directorate of Hydrography and Navigation, Brazilian Navy, will be held from 23-28 November 2009 at the Hotel Orizzonte, Niterói, RJ, Brazil and this will be first time the course has been conducted in South America.     The Multibeam Course is a 36-lecture, 6-day course primarily designed to provide a theoretical and practical background in marine multibeam survey technology and techniques. The information is tailored for those using marine multibeam survey systems in both the traditional hydrographic survey field (for safety of navigation and nautical charting) as well... (read more)
2009-10-19 10:14:45

Opportunistic Multibeam Surveying

Deep-sea Research Expeditions Expand Multibeam Bathymetric Map of Seafloor
Currently only ten to fifteen percent of the ocean floor has been mapped at resolutions of 100-metre pixel size or better and the vast majority of this mapped area is within territorial waters. One way to significantly increase seafloor coverage is to outsource data collection to non-hydrographic vessels or ships of opportunity. However, data currently being collected by these vessels are largely unmanaged, leading to possible redundant coverage and/or inconsistent quality. It is a good idea that the scientific and hydrographic communities make effective use of ships of opportunity in order to optimise data collection in the immense areas in... (read more)
2015-08-26 11:54:30

Deepwater Multibeam for COMRA

China’s Ocean Mineral Research and Development Agency (COMRA) has recently taken delivery of its R/V Da Yang for a new generation of deepwater multibeam technology SEA BEAM 3012. The upgrade to 3012 was installed in autumn 2002 and accepted in February 2003 following intensive deepwater trials. SEA BEAM 3012 offers a fully motion-compensated PC-based deepwater multibeam system, achieving motion compensation by swept beam technology. (read more)
2003-10-25 12:00:00

Faster Multibeam Data Handling

CARIS has released a 64-bit version of its hydrographic processing software HIPS and SIPS. This new version HIPS and SIPS 7.1 will provide users who have access to a 64-bit computer the ability to handle large multibeam sonar datasets even faster.   In-house tests revealed that the CUBE surface creation and Merge processes are now 15-30% faster respectively. The 64-bit technology also allows access to larger banks of RAM, increasing the ability to multi-task while processing. HIPS and SIPS supports over 40 sonar and Lidar formats, allowing it to process data from virtually any system configuration. The software also includes... (read more)
2011-05-05 09:22:52
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