Results 131 to 140 of about 974 (171)
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Statistical Characterization of Multibeam Bathymetry Data
2001Abstract : Multibeam sonar systems produce high-density depth data of the ocean floor. Point pattern analysis of the individual depth points is conducted to determine an appropriate parameterized point-to-event distance distribution, F(y). This distribution is needed to quantify the lower bound on the estimated position error of a terrain-based ...
Brian Bourgeois +3 more
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Multibeam Bathymetry of the Håkon Mosby Mud Volcano
Marine Geophysical Researches, 2005The Hakon Mosby Mud Volcano is a natural laboratory to study geological, geochemical, and ecological processes related to deep-water mud volcanism. High resolution bathymetry of the Hakon Mosby Mud Volcano was recorded during RV Polarstern expedition ARK XIX/3 utilizing the multibeam system Hydrosweep DS-2.
Andreas Beyer +2 more
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Automated error detection in multibeam bathymetry data
Proceedings of OCEANS '93, 2002For a variety of reasons, multibeam swath sounding systems produce errors that can seriously corrupt navigational charts. To address this problem, the authors have developed two algorithms for identifying subtle outlier errors in a variety of multibeam systems. The first algorithm treats the swath as a sequence of images.
S. Shaw, J. Arnold
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Registration of Airborne LiDAR Bathymetry and Multibeam Echo Sounder Point Clouds
IEEE Geoscience and Remote Sensing Letters, 2022Airborne light detection and ranging (LiDAR) bathymetry (ALB) and multibeam echo sounder (MBES) are both active remote sensing technologies that are complementary in terms of survey scope. The registration of ALB and MBES data can provide complete overwater and underwater geoinformation on a measurement target.
Xiankun Wang +5 more
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Multibeam Bathymetry and Slope Stability of Isvika Bay, Murchisonfjorden, Nordaustlandet
Marine Geodesy, 2012A research expedition to the polar region of Murchisonfjorden (Nordaustlandet, Svalbard) on the research vessel Horyzont II took place in August 2009. This paper presents results from an extensive bathymetric measurement campaign of the Isvika Bay, southern part of Murchisonfjorden.
Moskalik, Mateusz +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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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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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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Comparison of bathymetry estimated from multibeam echosounder and optical data
Remote Sensing for Agriculture, Ecosystems, and Hydrology XXVIAntonino Maltese
exaly +2 more sources