Shallow water height mapping with interferometric synthetic aperture sonar

Silva, S.R.; Cunha, Sérgio; Matos, Aníbal; Cruz, Nuno

doi:10.1109/oceans.2008.5151972

Cited by 7 publications

(2 citation statements)

References 15 publications

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“…Examples of its application include the synthetic aperture sonar (SAS) system by the National Defense Center of Excellence for Research in Ocean Sciences in the United States, 2 the synthetic aperture mapping and imaging SAS system in Europe, 3 kiwi-SAS system in New Zealand, 4 HISAS system in Norway, 5,6 InSAS system by the Naval University of Engineering in China, 7 and others. 8,9 InSAS is a relatively new three-dimensional imaging sonar technique. 10–12 Compared with SAS, 13–19 its advantage is that it has the ability of bathymetric.…”

Section: Introductionmentioning

confidence: 99%

Review of interferometric synthetic aperture sonar interferometric phase filtering methods

Huang,

Ding,

Wang

et al. 2023

Advances in Mechanical Engineering

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Interferometric synthetic aperture sonar (InSAS) is a novel three dimensional underwater mapping system, which is widely used in various fields. Interferometric phase filtering is a crucial process in InSAS signal processing. The study of interferogram filtering method has great significance to improve the signal-to-noise ratio (SNR) of interferogram, reduce the difficulty of phase unwrapping, and improve the accuracy of digital elevation maps. Firstly, this article introduces the sources of interferometric phase noise. Secondly, it illustrates the difference between real domain filter and complex domain filter by simulation experiment. Thirdly, the various methods of InSAS interferogram filtering are systematically studied, which can be classified into spatial domain filtering and transform domain filtering. The transform domain filtering can be further divided into frequency domain and wavelet transform filtering. Moreover, the advantages and disadvantages of various methods are analyzed theoretically. Finally, numerical simulation and real-data processing experiments are performed, and the advantages and shortcomings of several methods are compared using residue numbers, root mean square error (RMSE), and CPU time as evaluation criteria.

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Section: Introductionmentioning

confidence: 99%

Review of interferometric synthetic aperture sonar interferometric phase filtering methods

Huang,

Ding,

Wang

et al. 2023

Advances in Mechanical Engineering

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“…T his paper describes experimental interferometric synthetic aperture sonar (SAS) mounted on an unmanned surface vehicle that is being developed at the University of Porto (Silva et al, , 2008c. The goal is to use single-element low-cost sonar to obtain synthetic aperture imagery through the use of this platform and its ability to gather highprecision navigation data that are then used to synthesize the sonar images in a motion-corrected manner.…”

Section: Introductionmentioning

confidence: 99%

Shallow Water Surveying Using Experimental Interferometric Synthetic Aperture Sonar

Silva¹,

Cunha²,

Matos³

et al. 2009

mar technol soc j

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A B S T R A C TThis paper describes an interferometric synthetic aperture sonar system based on an unmanned surface vehicle customized for shallow water environments. Synthetic aperture sonar enables imagery of high resolution that is independent of range by using the displacement of the sonar platform to create a large virtual array. If two geometrically displaced images are obtained, the construction of threedimensional topographic maps is possible through the use of interferometric techniques. The use of an unmanned surface vehicle presents several advantages that alleviate some problems related to the formation of synthetic aperture images, which are mainly related to the fact that a precise navigation system can be used for the boat control and sonar imagery motion compensation. Also, a small unmanned surface vehicle is advantageous in terms of cost of operation, maintenance and ease of deployment. Mapping of shallow water areas is an important task for many commercial and scientific applications like river navigability, infrastructure maintenance and natural resource monitoring. These tasks can be done efficiently with this system. Sample data obtained during test trials illustrate how synthetic aperture can be used to generate underwater imagery and bathymetric data. A B S T R A C TThis paper describes an interferometric synthetic aperture sonar system based on an unmanned surface vehicle customized for shallow water environments. Synthetic aperture sonar enables imagery of high resolution that is independent of range by using the displacement of the sonar platform to create a large virtual array. If two geometrically displaced images are obtained, the construction of threedimensional topographic maps is possible through the use of interferometric techniques. The use of an unmanned surface vehicle presents several advantages that alleviate some problems related to the formation of synthetic aperture images, which are mainly related to the fact that a precise navigation system can be used for the boat control and sonar imagery motion compensation. Also, a small unmanned surface vehicle is advantageous in terms of cost of operation, maintenance and ease of deployment. Mapping of shallow water areas is an important task for many commercial and scientific applications like river navigability, infrastructure maintenance and natural resource monitoring. These tasks can be done efficiently with this system. Sample data obtained during test trials illustrate how synthetic aperture can be used to generate underwater imagery and bathymetric data.

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