Results 181 to 190 of about 41,703 (217)
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Improving spatial resolution of interferometric bathymetry in multibeam echosounders
The Journal of the Acoustical Society of America, 2008Most multibeam echosounders used in seafloor mapping use the interferometry method for bathymetry measurement, based on the zero-crossing of the phase difference between two sub-arrays. In this approach, only one sounding is computed per formed beam, and the spatial resolution is linked to the beam footprint extent. Using the whole content of the phase
Llort Pujol, Gerard +2 more
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Application of high-resolution beamforming to multibeam swath bathymetry
Proceedings of OCEANS '93, 2002In the context of swath bathymetry with multibeam echo-sounders, seafloor echoes received at regularly spaced elements of a hydrophone array are summed coherently to form a number of directional beams from which athwartships depth measurements are derived.
Pantzartzis, D +2 more
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Improved vehicle based multibeam bathymetry using sub-maps and SLAM
2005 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2005This paper presents an algorithm to improve sub-sea acoustic multibeam bottom mapping based on the simultaneous mapping and localization (SLAM) methodology. Multibeam bathymetry from underwater water vehicles can yield valuable large scale terrain maps of the sea door, but the overall accuracy of these maps is typically limited by the accuracy of the ...
Christopher N. Roman, Hanumant Singh
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A Radon-Transform-Based Image Noise Filter—With Applications to Multibeam Bathymetry
IEEE Transactions on Geoscience and Remote Sensing, 2015This paper describes a linear-image-transform-based algorithm for reducing stripe noise, track line artifacts, and motion-induced errors in remote sensing data. Developed for multibeam bathymetry (MB), the method has also been used for removing scalloping in synthetic aperture radar images.
Knut Landmark +4 more
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Predicting Seafloor Facies from Multibeam Bathymetry and Backscatter Data
Photogrammetric Engineering & Remote Sensing, 2004An empirical technique has been developed that is used to predict seafloor facies from multibeam bathymetry and acoustic backscatter data collected in central Santa Monica Bay, California. A supervised classification used backscatter and sediment data to classify the area into zones of rock, gravelly-muddy sand, muddy sand, and mud.
Dartnell, P., Gardner, James V.
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Hydrographische Nachrichten, 2014 Performance of angle estimation methods applied to multibeam swath bathymetry
Proceedings of OCEANS'94, 1994The performance is assessed of standard angle estimation methods applied to the evaluation of the direction of arrival of the seafloor returns, in the context of multibeam swath bathymetry. It is shown to be limited not only by the electronic or ambient noise on the hydrophones, but also by two noise contributions which result from the angular extent ...
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MULTIBEAM BATHYMETRY STUDIES IN THE BAHIA SEAMOUNTS REGION
1st International Congress of the Brazilian Geophysical Society, 1989N.Z. Cherkis, D.A Chayes
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Segmentation of Multibeam Echosounder Bathymetry and Backscatter
OCEANS 2024 - SingaporeCoffelt, Jeremy Paul +3 more
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Automatic calibration for wobble errors in shallow water multibeam bathymetries
Journal of Oceanology and Limnology, 2022Tianyu Yun +5 more
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