Results 61 to 70 of about 1,320,226 (145)

Azimuth ambiguities in broadside and squint mode synthetic aperture sonar

, 1999
Synthetic aperture sonar (SAS) mapping rates are limited by acoustic propagation speed in relation to feasible platform velocity and the desired swath coverage.
McHugh, R., Shaw, S., Taylor, N., R. McHugh, S. Shaw, N. Taylor   +5 more
core   +1 more source

Semiparametric constant false alarm rate method for radar and sonar images

Electronics Letters, Volume 60, Issue 5, March 2024.
This study proposed a novel constant false alarm rate (CFAR) method based on Gaussian mixture model (GMM). The reason for starting this work is that some new polarimetric detectors and the high‐resolution cases may lead to the failure of traditional parametric model.
Ke Li, Peng Zhang, Ziyuan Yang
wiley   +1 more source

Studies into the detection of buried objects (particularly optical fibres) in saturated sediment. Part 4: experimental investigations into the acoustic detection of objects buried in saturated sediment

, 2007
This report is the fourth in a series of five, designed to investigate the detection oftargets buried in saturated sediment, primarily through acoustical or acoustics-relatedmethods.
Evans, R.C.P.
core   +1 more source

Increasing circular synthetic aperture sonar resolution via adapted wave atoms deconvolution [PDF]

, 2017
Circular Synthetic Aperture Sonar (CSAS) processing computes coherently Synthetic Aperture Sonar (SAS) data acquired along a circular trajectory. This approach has a number of advantages, in particular it maximises the aperture length of a SAS system ...
Bernard Mulgrew, Pailhas, Yan, Petillot, Yvan; id_orcid, Yvan Petillot, Yan Pailhas, Mulgrew, Bernard   +5 more
core   +1 more source

Synthetic aperture imaging algorithms : with application to wide bandwidth sonar [PDF]

, 1996
This thesis contains the complete end-to-end simulation, development, implementation, and calibration of the wide bandwidth, low-Q, Kiwi-SAS synthetic aperture sonar (SAS). Through the use of a very stable towfish, a new novel wide bandwidth transducer
Hawkins, David William
core   +1 more source

Synthetic Aperture Sonar Seabed Environment Dataset (SASSED)

, 2022
Approved for Public Release; distribution is unlimited.Dataset title: Synthetic Aperture Sonar Seabed Environment Dataset (SASSED)Date: June 2018Description: This dataset contains 129 complex-valued, single (high frequency) channel, 1001x1001 pixel ...
Gerg, Isaac, Gerg, I (via Mendeley Data)
core   +1 more source

Investigating multi-modal detection for unmanned marine vehicles: magnetic vs. synthetic aperture sonar and gravimetry

Frontiers in Marine Science
Unmanned maritime vehicles (UMVs) are increasingly used in several maritime domain applications including seafloor mapping, mine countermeasures, pipeline and infrastructure inspection, and unexploded ordnance detection.
Jeremy Karst, Vishwamithra Sunkara, Joseph Luttrell, Ralf Riedel, James Thompson, Corey Nilges   +5 more
doaj   +1 more source

Guest Editorial: Synthetic aperture in sonar and radar

IET Radar, Sonar &Navigation, Volume 18, Issue 11, Page 2017-2019, November 2024.
Marco Martorella, Gary Heald, Anthony Lyons, Michail Antoniou   +3 more
wiley   +1 more source

Area and depth coverage assessment for low-frequency synthetic aperture sonar unexploded ordnance detection surveys

, 2021
44Low frequency synthetic aperture sonar (LF-SAS) is a key technique for the detection and characterization of unexploded ordnance (UXO) in the underwater environment. For buried UXO, however, it is rather difficult to determine the range and depth up to
Beckers, A.L.D., Vossen, R. van, Mulders, I., Duijster, A.J., Burg, D. van der, Sande, J.J.M. van de   +5 more
core  

An Introduction to Synthetic Aperture Sonar (SAS)

, 2015
While conventional sidescan sonars are commonly used for seafloor imaging, they suffer from some basic limitations. Firstly, the imaging resolution, or the system\u27s ability to distinguish closely spaced objects, is not constant but degrades with range.
Blomberg, Ann E. A.
core   +1 more source