Design and Experimental Results of a 300-kHz Synthetic Aperture Sonar Optimized for Shallow-Water Operations

Bellettini, A.; Pinto, Marc

doi:10.1109/joe.2007.907933

Cited by 57 publications

(38 citation statements)

References 9 publications

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“…3. The SAS has a center frequency of 300 kHz and a bandwidth of 60 kHz [25]; the receiver array comprises 36 elements with a spacing of 3.33 cm and has a total length of 1.2 m. The navigation system on the MUSCLE comprises an inertial measurement unit, DVL, and global positioning system sensor. The data were collected during the MANEX'14 trial in the Ligurian Sea, near the coast of Framura, Italy.…”

Section: Resultsmentioning

confidence: 99%

Repeat-Pass Synthetic Aperture Sonar Micronavigation Using Redundant Phase Center Arrays

Hunter

Dugelay

Fox

2016

IEEE J. Oceanic Eng.

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In this paper, a new algorithm is introduced for high-precision underwater navigation using the coherent echo signals collected during repeat-pass synthetic aperture sonar (SAS) surveys. The algorithm is a generalization of redundant phase center (RPC) micronavigation, expanded to RPCs formed between overlapping pings in repeated passes. For each set of overlapping ping pairs (two intrapass and three interpass), five different RPC arrays can be formed to provide estimates of the vehicle's surge, sway, and yaw. These estimates are used to find a weighted least squares solution for the trajectories of the repeated passes. The algorithm can estimate the relative trajectories to subwavelength precision (on order of millimeters to hundreds of micrometers at typical SAS operating frequencies of hundreds of kilohertz) in a common coordinate frame. This will lead to improved focusing and coregistration for repeat-pass SAS interferometry and is an important step toward repeat-pass bathymetric mapping. The repeat-pass RPC micronavigation algorithm is demonstrated using data collected by the 300-kHz SAS of the NATO Center for Maritime Research and Experimentation (CMRE) Minehunting Unmanned underwater vehicle for Shallow water Covert Littoral Expeditions (MUSCLE).

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Section: Resultsmentioning

confidence: 99%

Repeat-Pass Synthetic Aperture Sonar Micronavigation Using Redundant Phase Center Arrays

Hunter

Dugelay

Fox

2016

IEEE J. Oceanic Eng.

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“…Here, we list a few to show the variety in the systems. In Bellettini and Pinto (2009), the SAS system is specifically designed to obtain good shallow water performance. The center frequency is 300 kHz, and the array length is 1.2 m giving 200-m range at 2-m/s speed.…”

Section: Current Sonar Systemsmentioning

confidence: 99%

“…This gives a maximum range of 100 m at 2-m/s speed. A new SAS manufacturer, Kraken sonar (www.krakensonar.com), has a design very similar to Bellettini and Pinto (2009). The HISAS 1030 system from Kongsberg Maritime (www.…”

Section: Current Sonar Systemsmentioning

confidence: 99%

Synthetic Aperture Sonar Technology Review

Hansen¹

2013

mar technol soc j

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A B S T R A C TSonar imaging has numerous applications in the underwater domain. Highresolution sonar images are useful in marine research, underwater construction work, offshore oil and gas, search for objects, and in the military sector. Common in many applications is the desire for higher resolution, better image quality, longer range, and smaller hardware footprint. Synthetic aperture sonar (SAS) technology can improve resolution and/or range substantially compared to traditional technology. Recent developments in SAS make this technology more available now. This paper gives a review of SAS technology and shows example of SAS applications. The paper lists the current state-of-the-art and the future trends of SAS.

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“…Application to sonar adds volume reverberation from the water column R vol , the sea surface R surf , and multipath R mpath . Surface reverberation and multipath must be considered for accurate estimation of the contrast for operation in littoral waters [6]. Because they are assumed to be statistically independent, the multiplicative noise terms are combined as follows:…”

Section: Multiplicative Noisementioning

confidence: 99%