Results 101 to 110 of about 1,913,452 (223)

sonar

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Annoymous author (8479637)
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Addressing Non-Uniqueness in Guided Wave Tomography for Limited-View Corrosion Mapping

NDT - Journal of Non-Destructive Testing
Guided wave tomography has proven to be an effective method for detecting pipeline corrosion, providing both location and quantitive estimates of wall thickness loss.
Emiel Hassefras, Arno Volker, Martin Verweij   +2 more
doaj   +1 more source

Hybrid phase shift and shifted sideband beamforming for large‐aperture MIMO sonar imaging

IET Radar, Sonar & Navigation, 2017
A multiple‐input multiple‐output (MIMO) sonar can form a large‐aperture virtual uniform linear array (ULA) from a small number of physical elements. However, the large‐aperture MIMO sonar encounters a dilemma between the computation load and the imaging ...
Xionghou Liu, Chao Sun, Yixin Yang, Jie Zhuo   +3 more
doaj   +1 more source

A Method to Track Targets in Three-Dimensional Space Using an Imaging Sonar

Sensors, 2018
This paper introduces a methodology applying an imaging sonar for three-dimensional (3D) target tracking underwater. The key process in this work involves obtaining the target’s position in space using two images of the same scene, acquired by an ...
Danxiang Jing, Jun Han, Jin Zhang
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Beaked whales respond to simulated and actual navy sonar [PDF]

, 2011
This article is distributed under the terms of the Creative Commons Public Domain declaration. The definitive version was published in PLoS One 6 (2011): e17009, doi:10.1371/journal.pone.0017009.Beaked whales have mass stranded during some naval sonar ...
Christopher W. Clark, Walter M. X. Zimmer, DiMarzio Nancy, Boyd Ian L., Durban, John W., Durban John W., Brandon L Southall, Moretti, David, Tyack, Peter L., Claridge Diane E., DiMarzio, Nancy A., Angela D'Amico, Peter L. Tyack, Ian L. Boyd, David Moretti, D'Amico, Angela, Ward, Jessica, John W Durban, Ward Jessica, Zimmer Walter M. X., Walter M X Zimmer, McCarthy, Elena, Peter L Tyack, Jessica Ward, Clark Christopher W., Brandon L. Southall, D'Amico Angela, Boyd, Ian L., Claridge, Diane E., Moretti David, Jarvis, Susan, Ian L Boyd, Morrissey, Ronald, Southall Brandon L., John W. Durban, Clark, Christopher W., Susan Jarvis, Nancy DiMarzio, Morrissey Ronald, Diane E. Claridge, Ronald Morrissey, Tyack Peter L., Zimmer, Walter M. X., Jarvis Susan, Southall, Brandon L., Christopher W Clark, Elena McCarthy, Moretti, David J., DiMarzio, Nancy, Diane E Claridge, McCarthy Elena, Tyack, Peter L.; id_orcid   +51 more
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3D Seabed Mapping and localization of AUV using imaging sonar

, 2021
This paper proposes a 3D sonar mapping method and autonomous underwater vehicle (AUV) localization method using an imaging sonar. The 2D sonar images are registered to generate a 2D mosaic sonar map.
YU, SON-CHEOL, BYEONGJIN, KIM
core  

Seasonal Characterisation of Sonar Performance for Effective Underwater Surveillance in the Marmara Sea

IET Radar, Sonar & Navigation
This study analyses sonar performance for underwater object detection in four regions of the Marmara Sea, using oceanographic data from the Turkish Naval Forces and open source datasets.
Murat Murat, Ugur Kesen
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The utility of synthetic aperture sonar in seafloor imaging [PDF]

, 2005
Synthetic Aperture Sonar (SAS) is a high-resolution acoustic imaging technique which is an extension of normal sidescan sonar imaging. The cross-range (azimuthal) resolution in real aperture sonar is dependent on distance to the illuminated scene and ...
Szczegielniak, M.
core  

Komparasi Pengolahan Data Side Scan Sonar Menggunakan 2 (dua) Perangkat Lunak Triton Imaging Isis dan Sonarwiz (Studi Kasus Perairan Batam Kepulauan Riau): Comparison of Side Scan Sonar Data Processing Using 2 (two) Softwares Triton Imaging Isis and Sonarwiz (Case Study of Batam Waters, Riau Islands)

, 2019
Survei dan pemetaan laut yang sangat diperlukan dalam berbagai aplikasi kelautan dapat dilakukan dengan berbagai cara, salah satunya dengan proses pencitraan dasar laut.
Kusuma, Adhi, Mulyadi, Dikdik S., Amril, Amril, Prasetyo, Agung, Santoso, Agus Iwan, Efendi, Tria   +5 more
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Optimising collection geometry for long‐range synthetic aperture sonar interferometry

IET Radar, Sonar & Navigation
Interferometric synthetic aperture sonar (SAS) is a technique to image and map the seabed in very high resolution. For large area coverage rate systems with hundreds of metres swath width, the achievable performance varies significantly over the swath ...
Roy Edgar Hansen, Torstein Olsmo Sæbø
doaj   +1 more source