Side Scan Sonar Target Detection in the Presence of Bottom Backscatter PDF Download
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Languages : en
Pages : 0
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The effect of bottom backscatter on target detection ranges for 100- kHz Klein and EG & G side scan sonars was investigated. Glass spheres of 16-cm diameter with measured target strengths of -24 dB were deployed in 30-m water depth, 0.7 m above sand and shale bottoms. Controlled test runs past a linear target configuration were performed. For a sand bottom, the Klein system yielded target detections at a maximum range of 150 m with 100% success. The EG & G system yielded 100% detection out to 152-m range, with detection 46% of the time at 259 m and 86% at 228 m. A shale bottom masked all target returns negating detection. Detection thresholds were estimated by comparing field results to theoretical ranges calculated from the sonar equation using applicable backscatter coefficients. The results show that it is possible to determine the geophysical and side scan system inputs sufficiently well to allow determination of the efficient spacing of survey lines in shallow water hydrographic applications of side scan sonar.
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Category :
Languages : en
Pages : 0
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Book Description
The effect of bottom backscatter on target detection ranges for 100- kHz Klein and EG & G side scan sonars was investigated. Glass spheres of 16-cm diameter with measured target strengths of -24 dB were deployed in 30-m water depth, 0.7 m above sand and shale bottoms. Controlled test runs past a linear target configuration were performed. For a sand bottom, the Klein system yielded target detections at a maximum range of 150 m with 100% success. The EG & G system yielded 100% detection out to 152-m range, with detection 46% of the time at 259 m and 86% at 228 m. A shale bottom masked all target returns negating detection. Detection thresholds were estimated by comparing field results to theoretical ranges calculated from the sonar equation using applicable backscatter coefficients. The results show that it is possible to determine the geophysical and side scan system inputs sufficiently well to allow determination of the efficient spacing of survey lines in shallow water hydrographic applications of side scan sonar.
Author: Maureen R. Kenny
Publisher:
ISBN:
Category :
Languages : en
Pages : 135
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Book Description
The effect of bottom backscatter on target detection ranges for 100- kHz Klein and EG & G side scan sonars was investigated. Glass spheres of 16-cm diameter with measured target strengths of -24 dB were deployed in 30-m water depth, 0.7 m above sand and shale bottoms. Controlled test runs past a linear target configuration were performed. For a sand bottom, the Klein system yielded target detections at a maximum range of 150 m with 100% success. The EG & G system yielded 100% detection out to 152-m range, with detection 46% of the time at 259 m and 86% at 228 m. A shale bottom masked all target returns negating detection. Detection thresholds were estimated by comparing field results to theoretical ranges calculated from the sonar equation using applicable backscatter coefficients. The results show that it is possible to determine the geophysical and side scan system inputs sufficiently well to allow determination of the efficient spacing of survey lines in shallow water hydrographic applications of side scan sonar.
Author: Wade H. Shafer
Publisher: Springer Science & Business Media
ISBN: 1468449192
Category : Science
Languages : en
Pages : 314
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Book Description
Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1 957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 28 (thesis year 1 983) a total of 10,661 theses titles from 26 Canadian and 197 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 28 reports theses submitted in-1983, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.
Author: Philippe Blondel
Publisher: Springer Science & Business Media
ISBN: 3540498869
Category : Science
Languages : en
Pages : 344
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Book Description
Sidescan sonar is proving to be the preeminent technique for researchers and professionals seeking knowledge about the structure and behavior of the seafloor, but its data is often difficult to interpret due to the physics of acoustic remote sensing, and to the varied geological processes at play. This book covers the fundamentals of sidescan sonar, incorporates new understanding of marine structures, and explains how to interpret sidescan sonar imagery and bathymetry.
Author: Charles Mazel
Publisher:
ISBN:
Category : Sonar
Languages : en
Pages : 174
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Book Description
Author: Xiao Wang
Publisher: Infinite Study
ISBN:
Category :
Languages : en
Pages : 16
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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.
Author: Heather Relyea
Publisher: LAP Lambert Academic Publishing
ISBN: 9783844383607
Category : Chesapeake Bay (Md. and Va.)
Languages : en
Pages : 60
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Book Description
This study explored the relationship between bottom sample characteristics and backscatter intensities of high-frequency side scan sonar. Bottom samples collected during the summer of 2009 from an area at the mouth of the Chesapeake Bay in Virginia were compared with side-scan sonar readings taken from the same area by the NOAA hydrographic research ship Thomas Jefferson from 2007-2009. Fifty sediment samples were collected in the study area and analyzed to determine percent carbonate, total organic content, and grain size. These data were then plotted against seven overlapping 455 kHz side-scan sonar mosaics using ArcGIS to visually examine how differences in sediment characteristics relate to differences in the backscatter intensity. Analysis of the data showed that there is a positive correlation between sediment grain size and side-scan backscatter intensity throughout the range of intensities, with a stronger correlation for high intensity areas and coarse grain sizes, but a much weaker correlation in lower intensity areas.
Author: James Derek Tucker
Publisher:
ISBN:
Category : Acoustic imaging
Languages : en
Pages : 244
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Author: Gary Donald Melvin
Publisher:
ISBN:
Category : Acoustic emission testing
Languages : en
Pages : 38
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Author: P. N. Denbigh
Publisher:
ISBN:
Category : Sonar
Languages : en
Pages : 160
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