Results 31 to 40 of about 41,703 (217)

A Novel Cone Model Filtering Method for Outlier Rejection of Multibeam Bathymetric Point Cloud: Principles and Applications

open access: yesSensors, 2023
The utilization of multibeam sonar systems has significantly facilitated the acquisition of underwater bathymetric data. However, efficiently processing vast amounts of multibeam point cloud data remains a challenge, particularly in terms of rejecting ...
Xiaoyang Lv   +3 more
doaj   +1 more source

Multibeam Bathymetry and CTD-Measurements in two fjord systems in Southeast Greenland [PDF]

open access: yesEarth System Science Data, 2017
Abstract. We present bathymetry and hydrological observations collected in the summer of 2014 from two fjord systems in Southeast Greenland, using SS Activ with a multibeam system temporally installed over the side of the ship. Our results provide a detailed bathymetric map of the fjord complex around Skjoldungen Island and the outer part of ...
K. K. Kjeldsen   +9 more
openaire   +7 more sources

Multibeam bathymetry raw data (Kongsberg EM 122 entire dataset) of RV METEOR during cruise M126

open access: yes, 2023
Multibeam bathymetry raw data using the ship's own Kongsberg EM 122 multibeam echosounder was almost continuously recorded during RV METEOR cruise M126. Data was recorded on 28 days between 2016-04-20 and 2016-05-20. This dataset contains a survey in the
Albrecht, Sebastian, Dubilier, Nicole
core   +1 more source

Bathymetry and Geomorphology of Shelikof Strait and the Western Gulf of Alaska

open access: yesGeosciences, 2019
We defined the bathymetry of Shelikof Strait and the western Gulf of Alaska (WGOA) from the edges of the land masses down to about 7000 m deep in the Aleutian Trench.
Mark Zimmermann   +2 more
doaj   +1 more source

Discovering the Fine-Scale Morphology of the Gulf of Cádiz: An Underwater Imaging Analysis

open access: yesJournal of Marine Science and Engineering, 2022
The dense and deep water flow that leaves the Mediterranean Sea to the Atlantic flows through the upper and middle slope of the Gulf of Cádiz as a powerful bottom stream that models and interacts with bathymetry.
Raúl Jiménez-Romero   +4 more
doaj   +1 more source

A Crossover Adjustment Method Considering the Beam Incident Angle for a Multibeam Bathymetric Survey Based on USV Swarms

open access: yesJournal of Marine Science and Engineering
Multibeam echosounder systems (MBESs) are widely used in unmanned surface vehicle swarms (USVs) to perform various marine bathymetry surveys because of their excellent performance. To address the challenges of systematic error superposition and edge beam
Qiang Yuan   +3 more
doaj   +1 more source

Improved Arctic Ocean Bathymetry Derived From DTU17 Gravity Model

open access: yesEarth and Space Science, 2019
The existing bathymetry map of the Arctic is a compilation of ship soundings and digitized contours. Due to the presence of all‐year sea ice, costly operations and political restrictions, dense and full coverage of the Arctic is not possible, leaving ...
Adili Abulaitijiang   +2 more
doaj   +1 more source

Sources and Impacts of Bottom Slope Uncertainty on Estimation of Seafloor Backscatter from Swath Sonars

open access: yesGeosciences, 2019
Seafloor backscatter data from multibeam echosounders are now widely used in seafloor characterization studies. Accurate and repeatable measurements are essential for advancing the success of these techniques.
Mashkoor Malik
doaj   +1 more source

A validated 3D point‐cloud analysis workflow for the creation of seagrass canopy height models

open access: yesMethods in Ecology and Evolution, EarlyView.
Abstract Seagrasses support highly productive ecosystems in both temperate and tropical waters and provide essential ecosystem services. Despite their importance, the vertical structure of seagrasses (i.e. the canopy) remains poorly characterised at the microscale, even though it is a strong predictor of ecological processes that influence both ...
Daniele Ventura
wiley   +1 more source

Submerged geomorphic record of Quaternary palaeoshorelines: terraces and clinothems along a shelf‐edge in the Žirje Archipelago, Adriatic Sea

open access: yesBoreas, EarlyView.
Numerous studies have shown that during the Quaternary there were substantial fluctuations in sea level in response to glacial–interglacial climate variability, reaching lowstand positions up to 134 m below the present sea level (b.s.l.). These fluctuations have had a strong influence on the morphology of shallow shelf seas, which preserve evidence of ...
Ozren Hasan   +7 more
wiley   +1 more source

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