Estimation of seafloor microtopographic roughness through modeling of acoustic backscatter data recorded by multibeam sonar systems

1993 ◽  
Vol 94 (5) ◽  
pp. 2776-2787 ◽  
Author(s):  
Haruyoshi Matsumoto ◽  
Robert P. Dziak ◽  
Christopher G. Fox
Keyword(s):  
Acoustic Backscatter ◽  
Multibeam Sonar ◽  
Sonar Systems

scholarly journals MORPHOLOGICAL AND SEDIMENTARY CHARACTERIZATION THROUGH ANALYSIS OF MULTIBEAM DATA AT DECEPTION ISLAND, ANTARCTIC

2016 ◽  
Vol 34 (2) ◽  
Author(s):  
Filipe Japiassú Leitão ◽  
Arthur Ayres Neto ◽  
Rosemary Vieira
Keyword(s):  
South Shetland Islands ◽  
Marine Geology ◽  
Deception Island ◽  
Geological Samples ◽  
Multibeam Sonar ◽  
Shetland Islands ◽  
Bathymetric Data ◽  
Sonar Systems ◽  
Multibeam Data

ABSTRACT. Multibeam sonar systems have transformed the area of underwater geoacoustics and present an important tool for seabed characterization. This work aims to demonstrate the processing and interpretation of multibeam bathymetric data, supported by geological samples collected in the area of Deception Island, South Shetland Islands – Antarctic...Keywords: bathymetry, seabed, marine geology, underwater geoacoustic. RESUMO. Sonares multifeixe têm transformado a área de geoacústica submarina e se apresentado como uma ferramenta importante para a caracterização do fundo marinho...Palavras-chave: batimetria, fundo marinho, geologia marinha, geoacústica submarina.

Accuracy Evaluation of Terrestrial LIDAR and Multibeam Sonar Systems Mounted on a Survey Vessel

2012 ◽  
Vol 138 (4) ◽  
pp. 203-213 ◽  
Author(s):  
Michael Dix ◽  
Amr Abd-Elrahman ◽  
Bon Dewitt ◽  
Lou Nash
Keyword(s):  
Accuracy Evaluation ◽  
Multibeam Sonar ◽  
Terrestrial Lidar ◽  
Sonar Systems

Visualizing Samsonfish (Seriola hippos) with a Reson 7125 Seabat multibeam sonar

2013 ◽  
Vol 70 (3) ◽  
pp. 665-674 ◽  
Author(s):  
Miles J. G. Parsons ◽  
Iain M. Parnum ◽  
Robert D. McCauley
Keyword(s):  
High Resolution ◽  
Western Australia ◽  
Avoidance Behaviour ◽  
Acoustic Backscatter ◽  
Marine Science ◽  
Nearest Neighbour ◽  
Multibeam Sonar ◽  
Neighbour Distance ◽  
Habitat Features

Abstract Parsons, M. J. G., Parnum, I. M., and McCauley, R. D. 2013. Visualizing Samsonfish (Seriola hippos) with a Reson 7125 Seabat multibeam sonar – ICES Journal of Marine Science, 70: 665–674. In Western Australia, aggregations of Samsonfish (Seriola hippos) form each summer to spawn in waters west of Rottnest Island. In this study, a Reson 7125 Seabat multibeam sonar (400 kHz) was pole mounted aboard a 21.6 m vessel, conducting acoustic transects to acquire acoustic backscatter simultaneously from a midwater aggregation of S. hippos and the wreck it surrounded. The processed backscatter produced high-resolution visualizations of both the fish and seabed. During a 15 min period, the centroid of the aggregation moved 91 m around the eastern and northeastern side of the wreck and probably exhibited lateral vessel avoidance behaviour from the survey vessel. Additionally, a northeasterly current at the site was inferred from subtle habitat features, suggesting that at the time of the survey the aggregation preferred to remain upcurrent of the wreck. These findings confirmed that the S. hippos aggregations do not necessarily remain directly above the wrecks and do not always remain sedentary. Aggregation acoustic density packing at the survey site was observed at 12.7 ± 2.4 m3 per fish, equivalent to ∼1.6 ± 0.1 body lengths nearest-neighbour distance.

Statistics of seafloor backscatter measured with multibeam sonar systems

2008 ◽  
Vol 123 (5) ◽  
pp. 3628-3628 ◽  
Author(s):  
John D. Penrose ◽  
Alexander Gavrilov ◽  
Iain M. Parnum
Keyword(s):  
Multibeam Sonar ◽  
Sonar Systems ◽  
Seafloor Backscatter
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