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1 edition of Side scan sonar target detection in the presence of bottom backscatter found in the catalog.

Side scan sonar target detection in the presence of bottom backscatter

Maureen R. Kenny

Side scan sonar target detection in the presence of bottom backscatter

by Maureen R. Kenny

  • 254 Want to read
  • 40 Currently reading

Published by Naval Postgraduate School in Monterey, California .
Written in English

    Subjects:
  • Oceanography (Hydrography)

  • Edition Notes

    Statementby Maureen R. Kenny and Jeffrey D. Mix
    ContributionsMix, Jeffrey D.
    ID Numbers
    Open LibraryOL25505042M

    Lidar (/ ˈ l aɪ d ɑːr /, called LIDAR, LiDAR, and LADAR) is a surveying method that measures distance to a target by illuminating the target with laser light and measuring the reflected light with a sensor. Differences in laser return times and wavelengths can then be used to make digital 3-D representations of the target. The name lidar, now used as an acronym of light detection and.   A sonar system using frequency bursts. A sonar system for use with a vessel may include a sonar module having a transmitting element configured to generate a transmit signal, where the transmit signal comprises one or more bursts, and where at least one burst comprises a first portion having a first frequency and a second portion having a second frequency different than the first . Y. Rzhanov, “ Review of Methods and Software for Processing of Underwater Imagery and Construction of Mosaics ”, Center for Coastal and Ocean Mapping / Joint Hydrographic Center, Durham, NH, Automated target classification in high resolution dual frequency sonar imagery Tom Aridgides, Manuel Fernández Proc. SPIE , Detection and Remediation Technologies for Mines and Minelike Targets XII, S (26 April ); doi: /

    Side-scan sonar (1, words) Side-scan sonar (also sometimes called side scan sonar, sidescan sonar, side imaging sonar, side-imaging sonar and bottom classification sonar) is a category. i (1, words) integrated IFF and high scan rate for high speed target detection. The radar is produced. Backscatter X-ray (5, words). Simultaneous compression and denoising of side scan sonar images using the discrete wavelet transform Cunha, R.A. / Figueiredo, M.T. / Silvestre, C.J. | digital version print version. Tanctr Side scan sonar will very effectively image large areas of seabed. Because of this, the sonar is commonly used to find specific targets in a large body of water. When a vessel goes down, or an aircraft crashes into the water and sinks, a systematic. search. with a side scan sonar can pinpoint the target with high accuracy. In. Geophysical MASINT is a branch of Measurement and signature intelligence (MASINT) that involves phenomena transmitted through the earth (ground, water, atmosphere) and manmade structures including emitted or reflected sounds, pressure waves, vibrations, and magnetic field or ionosphere disturbances.. According to the United States Department of Defense, MASINT is technically derived.

    We collected acoustic data (by means of Side Scan Sonar and Chirp-Sub bottom profiler) of maërl beds from Cilento peninsula, Tyrrhenian Sea and 4 grab samples. Acoustic data have been processed in order to define the related echo-facies in the framework of literature models and the main features of the acoustic response. Acoustic methods are widely used in fisheries research, often providing vital information that can be obtained in no other way. In reviewing active methods, phenomena of sound scattering are first described. The means of ensonification and detection, the generic sonar, is by: For the designer, the book describes the necessary theoretical and practical aspects involved in developing a transducer to most effectively suit the application and it discusses the main features of the various types of designs. Softcover. pages. ISBN: $ Introduction to the Theory and Design of Sonar Transducers. We have another great Webinar Wednesday lined up for you - this week we focus on marine autonomy. Join us as Dan Shropshire provides a brief history on the evolution of marine vehicle autonomy, followed by an overview of how Teledyne vehicles, from profiling floats to Gavia AUVs, use autonomy to efficiently and effectively complete a variety of underwater tasks.


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Side scan sonar target detection in the presence of bottom backscatter by Maureen R. Kenny Download PDF EPUB FB2

An AUV, which includes detection equipment such as side-scan sonar (SSS), 4 synthetic aperture sonar (SAS), 5 or multibeam echo sounder (MBES), 6 is a good carrier for collecting undersea data. The importance of knowing the method for seabed detection using side-scan sonar images with sonar instrument is a much-needed requirement right now.

This kind of threat also requires frequent Author: Philippe Blondel. The side scan sonar towfish is towed some 60 to m behind the survey vessel to maintain height at about 15 m from the bottom. Holes in the sea floor and small objects projecting upwards by as little as 3 cm can be detected.

The seabed is usually covered in sweeps of 30 degrees in width and is described graphically in Fig. Procedures entail towing the side scan sonar towfish 60– m. To accurately achieve side scan sonar (SSS) image target detection, a novel target detection algorithm based on a neutrosophic set (NS) and diffusion maps (DMs) is proposed in this paper.

In current practice, boulder detection often requires time-consuming manual interpretation of sidescan-sonar or multibeam echo sounder backscatter mosaics and/or confirmation by underwater video footage [].In principle, it has to be differentiated between the detection of buried boulders, and boulders exposed at Cited by: 4.

Ye Yincan et al, in Marine Geo-Hazards in China, Side Scan Sonar Detection Technology. Side scan sonar detection technology mainly makes use of acoustic imaging to analyze the scour of marine structures.

The earliest drag-type underwater sonar system originated in the United Kingdom in the s; it was mainly used for the detection of mines and other military objectives. Side scan sonar target detection in the presence of bottom backscatter book   Side scan sonars are widely used for objects detection in seabed clearance investigations.

Multibeam data about bathymetry Side scan sonar target detection in the presence of bottom backscatter book backscatter may be not enough in terms of detecting small objects, possibly dangerous for navigation. Side scan sonar provides monochromatic image of ensonified part of a seabed.3/5(2).

Side-scan sonar offers a measurement of backscatter from the seafloor, but without any angular information about the return (i.e. a flat seafloor is assumed) and the backscatter from both MBESs and side-scan sonar systems can be used to construct geo-located backscatter images and compiled mosaics that can be useful for viewing the geometry of Cited by: The Hammerhead accommodates third-party instruments, including side scan sonar, SV units, CTDs and multiparameter sensors.

It allows data collection from a single depth or performs an undulating profile between two set depths. Data can be read in real-time output on the touchscreen topside control box or into an independent software.

The system is equipped with ahead-looking and side-scan sonar for moored and bottom mine detection and with either TV or LIDAR for mine inspection. In addition to the submarine's mine surveillance role, NMRS gives it a covert reconnaissance capability as well.

The target detection system will then activate the mobile homing warhead, pass. Sonar Image Processing: Acoustic Backscatter. Adaptive three-dimensional range-crossrange-frequency filter processing string for sea mine classification in side scan sonar imagery.

Comparison of two different wavelet-based approaches for target detection in active sonar data. This comprehensive text-reference provides a solid background in active sensing technology.

It is concerned with active sensing, starting with the basics of time-of-flight sensors (operational principles, components), and going through the derivation of the radar range equation and the detection of echo signals, both fundamental to the understanding of radar, sonar and lidar imaging.

A sonar transducer assembly includes a housing mountable to a water craft capable of traversing a surface of a body of water. The sonar transducer assembly includes a linear downscan transmit/receive transducer element positioned within the housing, aimed downwardly, and configured to transmit sonar pulses in the form of a fan-shaped beam perpendicular to a plane of the surface of the.

Backscatter mosaics based on a multi-frequency multibeam echosounder survey in the continental shelf setting of the North Sea were compared. The uncalibrated backscatter data were recorded with frequencies ofand kHz. The results showed that the seafloor appears mostly featureless in acoustic backscatter mosaics derived from kHz by: This banner text can have markup.

web; books; video; audio; software; images; Toggle navigation. @article{osti_, title = {Shallow Water Imaging Sonar System for Environmental Surveying Final Report CRADA No. TC}, author = {Ng, L. and Rosenbaum, H.}, abstractNote = {The scope of this research is to develop a shallow water sonar system designed to detect and map the location of objects such as hazardous wastes or discarded ordnance in coastal waters.

Image normalization using the serpentine forward-backward filter: application to high-resolution sonar imagery and its impact on mine detection and classification Gerald Dobeck Proc. SPIE.Detection and Remediation Technologies for Mines and Minelike Targets X.

Deep-ocean polymetallic nodules form on or just below the vast, sediment-covered, abyssal plains of the global ocean.

Polymetallic nodules primarily consist of precipitated iron oxyhydroxides and Author: James R. Hein, Andrea Koschinsky, Thomas Kuhn.

(use for geological long-range inclined asdic, side scan sonar, side-scan sonar, sidescan, sidescan sonar mosaics) stream-gage measurement Use of specialized instruments designed for observing, checking, and recording the water discharge that occurs in a natural channel.

The transducer was mounted on a pole on the starboard side of the research vessel with the first beam of the sonar vertical and the 60th beam horizontal by 0 0 roll ship movements. Figure Changes of mean school area (solid line, left axis) and school distance to the transducer (dotted line, right axis) as this school pass starboard side the Cited by: 1.

We have also been developing new approaches to improve the bottom pdf capability of Reson sonar. Kraft, DeMoustier and Calder participated in the ONR-sponsored Kauai High Frequency Experiment.

During the course of this experiment deficiencies were noted in the robustness of the bottom detection algorithm of the Reson multibeam.Side-scan sonar (1, words) case mismatch in snippet view article find links to article Side-scan sonar (also sometimes called side scan sonar, sidescan sonar, side imaging sonar, side-imaging sonar and bottom classification sonar) is a category.Mission logic allows the ebook to perform a side-scan sonar search, break off the search when it identifies a target for close-in optical inspection, and then resume the search where it left off after imaging the target.