Synthetic aperture sonar processing for the HUGIN AUV

Hansen, Roy Edgar; Sæbø, Torstein Olsmo; Callow, H.J.; Hagen, Per Espen; Hammerstad, E.

doi:10.1109/oceanse.2005.1513210

Cited by 31 publications

(21 citation statements)

References 7 publications

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“…HISAS 1030 is a synthetic aperture sonar developed by FFI and Kongsberg Maritime [8]. The system produces ultra-high resolution acoustic images with co-registered bathymetry.…”

Section: F Hisas 1030mentioning

confidence: 99%

Scientific operations combining ROV and AUV in the Trondheim Fjord

Ludvigsen

Johnsen

Lågstad

et al. 2013

2013 MTS/IEEE OCEANS - Bergen

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This paper will show how AUV and ROV can complement each other in a scientific mapping campaign in the Trondheim Fjord. To complete this survey, a multidisciplinary approach was necessary to adapt the industrial and military technology to identify and map object of interest (OOI) on the seafloor. NTNU AUR-Lab and FFI mobilized for a collaborative cruise with ROV Minerva equipped with: video camera, dynamic positioning system, still camera for photo mosaic, UHI (Underwater Hyper spectral Imager), MRU and MBE and the AUV Hugin HUS with synthetic aperture side scan sonar and still camera as main instruments. These platforms complemented each other; the AUV had an unprecedented area capacity for mapping and search, while the ROV provided detailed information of the site.

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“…HISAS 1030 is a synthetic aperture sonar developed by FFI and Kongsberg Maritime [8]. The system produces ultra-high resolution acoustic images with co-registered bathymetry.…”

Section: F Hisas 1030mentioning

confidence: 99%

Scientific operations combining ROV and AUV in the Trondheim Fjord

Ludvigsen

Johnsen

Lågstad

et al. 2013

2013 MTS/IEEE OCEANS - Bergen

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“…By using an interferometric SAS, a large area including the pipeline can be mapped and imaged in one swath. Kongsberg Maritime and The Norwegian Defence Research Establishment (FFI) has developed a high-resolution interferometric SAS named HISAS 1030 [3], [4], along with an extensive processing tool named FOCUS [5]. In 2008 a HUGIN 1000-MR autonomous underwater vehicle (AUV) with HISAS-1030 was sold to the Royal Norwegian Navy (RNoN).…”

Section: Introductionmentioning

confidence: 99%

Interferometric synthetic aperture sonar in pipeline inspection

Hansen

Sæbø

Callow

et al. 2010

Oceans'10 Ieee Sydney

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Accurate and reliable inspection of subsea pipelines traditionally requires the use of multiple sensors, which again have different requirements for range and geometry. This makes pipeline inspection a time consuming and costly process. The use of high resolution synthetic aperture sonar (SAS) can potentially change this substantially. Current state of the art interferometric SAS systems offer very high resolution imagery and bathymetry over a very wide swath. Mounted on an autonomous underwater vehicle (AUV), such a system can provide highly detailed data sets of a pipeline with just one or two passes -either fully autonomously, or with operator supervision as desired. In June 2009, a Kongsberg Maritime HUGIN 1000-MR AUV equipped with a HISAS 1030 interferometric SAS performed such a pipeline inspection mission in Western Norway. The paper will show examples of the data recorded during the above mission.

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“…The sonar data used in this paper is collected using a 100 kHz HISAS-1030 SAS [4] run in standard mode with four overlapping phase centers. When processing sonar data with the default FOCUS toolbox based processing suit [5], crab angles of 15 • have been seen to cause image degradation [3].…”

Section: Introductionmentioning

confidence: 99%

Comparison of SAS processing strategies for crabbing collection geometries

Callow

2010

Oceans 2010 MTS/Ieee Seattle

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This paper presents a number of different processing strategies for generating synthetic aperture sonar (SAS) imagery when data collection suffers from significant sideways crab (where we define crab as the angle difference between track and heading). Whilst large amounts of sideways crab do not present fundamental limitations to the SAS method, the assumptions SAS processing chains are built upon are often violated under such conditions. We discuss typical assumptions and compare alternate image formation strategies. We also provide a short discussion of the fundamental limitations to crabbing systems. We found that the adjustments to our standard wavenumber-based imaging kernel increased crab-tolerance from approximately 7 degrees up to approximately 30.

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Synthetic aperture sonar processing for the HUGIN AUV

Cited by 31 publications

References 7 publications

Scientific operations combining ROV and AUV in the Trondheim Fjord

Scientific operations combining ROV and AUV in the Trondheim Fjord

Interferometric synthetic aperture sonar in pipeline inspection

Comparison of SAS processing strategies for crabbing collection geometries

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