Results 91 to 100 of about 97,482 (247)

Observations of deep coral and sponge assemblages in Olympic Coast National Marine Sanctuary, Washington. Cruise Report: NOAA Ship McArthur II Cruise AR06-07/07 [PDF]

, 2007
From May 22 to June 4, 2006, NOAA scientists led a research cruise using the ROPOS Remotely Operated Vehicle (ROV) to conduct a series of dives at targeted sites in the Olympic Coast National Marine Sanctuary (OCNMS) with the goal of documenting deep ...
Bowlby, C. E., Brancato, M. S., Brenkman, K., Hyland, J., Intelmann, S. S.   +4 more
core  

Near‐Field Acoustic Imaging Using Fiber‐Optic Distributed Acoustic Sensing and Beamforming Techniques

Advanced Science, Volume 13, Issue 6, 30 January 2026.
This work introduces a beamforming‐based method to generate acoustic images from fiber‐optic distributed acoustic sensing (DAS) data. By performing 2D scanning around the sensing fiber, the approach enables near‐field imaging and localization of acoustic sources, even in regions distant from the fiber. A data‐driven DAS channel selection improves image
Marcelo A. Soto, Diego Badillo‐San‐Juan   +1 more
wiley   +1 more source

Inversion of Side Scan Sonar Motion and Posture in Seabed Geomorphology

Polish Maritime Research, 2017
Side scan sonar measurement platform, affected by underwater environment and its own motion precision, inevitably has posture and motion disturbance, which greatly affects accuracy of geomorphic image formation.
Tao Weiliang, Liu Yan, Hu Wenbin
doaj   +1 more source

The use of multibeam sonar mapping techniques to refine population estimates of the endangered white abalone (Haliotis sorenseni) [PDF]

, 2006
Multibeam sonar mapping techniques provide detailed benthic habitat information that can be combined with the data on species-specific habitat preferences to provide highly accurate calculations of populations in a particular area. The amount of suitable
Butler, John, Cochrane, Guy, Kvitek, Rikk, Neuman, Melissa, Pinkard, Deanna   +4 more
core  

Synthesis to Design Spherical and Deformed Spherical Antenna Array Structures

Microwave and Optical Technology Letters, Volume 68, Issue 1, January 2026.
ABSTRACT Antenna array is a key component in various communication systems these days. Rather than various linear and planar array structures, antenna elements are strictly conformed to the curved‐shape surfaces they are mounted in conformal antenna arrays.
Hafiz Usman Tahseen, Luca Francioso, Syed Shah Irfan Hussain, Chiara de Pascali, Luca Catarinucci   +4 more
wiley   +1 more source

Mapping and Characterizing Subtidal Oyster Reefs Using Acoustic Techniques, Underwater Videography and Quadrat Counts [PDF]

, 2003
Populations of the eastern oyster Crassostrea virginica have been in long-term decline in most areas. A major hindrance to effective oyster management has been lack of a methodology for accurately and economically obtaining data on their distribution and
Adams, J R, Dijkstra, Semme J., Grizzle, Raymond E, Smith, Brian, Ward, R W   +4 more
core   +1 more source

A Multi-Scale Fusion Strategy for Side Scan Sonar Image Correction to Improve Low Contrast and Noise Interference

Remote Sensing
Side scan sonar images have great application prospects in underwater surveys, target detection, and engineering activities. However, the acquired sonar images exhibit low illumination, scattered noise, distorted outlines, and unclear edge textures due ...
Ping Zhou, Jifa Chen, Pu Tang, Jianjun Gan, Hongmei Zhang   +4 more
semanticscholar   +1 more source

Dual Frequency Side Scan Sonar Image Fusion for Deep‐Learning Based Underwater Target Detection

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
Traditional single‐frequency side‐scan sonar faces trade‐offs between imaging resolution and detection range, along with issues such as speckle noise and target–shadow coupling. To address these, this study proposes D2FNet, a dual‐domain fusion model integrating three key modules, which—tested on a new dataset of over 9000 paired sea‐trial images ...
Jiajun Xian, Liming Li, Fan Zhang, Yingying Wu, Weilin Zang, Lingji Xu, Hongxun Yao, Adam Rushworth, Johannes Michael Herrmann, Sanming Song   +9 more
wiley   +1 more source

Applicability of Traditional Acoustic Technology for Underwater Archeology: A Case Study of Model Detection in Xiamen Bay

Acoustics
This study addresses the applicability of conventional marine acoustic technologies for detecting non-metal artifacts. Based on the typical environment in Xiamen Bay, we evaluated the detection efficacy of common multibeam sonar, side-scan sonar, and sub-
Xudong Fang, Jianglong Zheng, Shengtao Zhou, Zepeng Huang, Boran Liu, Ping Chen, Jiang Xu   +6 more
doaj   +1 more source

Development of a 2 MHz Sonar Sensor for Inspection of Bridge Substructures

Sensors, 2018
Hydraulic factors account for a large part of the causes of bridge collapse. Due to the nature of the underwater environment, quick and accurate inspection is required when damage occurs.
Chul Park, Youngseok Kim, Heungsu Lee, Sangsik Choi, Haewook Jung   +4 more
doaj   +1 more source