Algorithmic improvements to the real-time implementation of a synthetic aperture sonar beam former

1997 ◽  
Author(s):  
Douglas K. Freeman
Keyword(s):  
Real Time ◽  
Synthetic Aperture ◽  
The Real ◽  
Synthetic Aperture Sonar

Real-time synthetic aperture sonar processing system

1996 ◽  
Vol 143 (3) ◽  
pp. 169 ◽  
Author(s):  
A.E. Adams ◽  
M.A. Lawlor ◽  
V.S. Riyait ◽  
O.R. Hinton ◽  
B.S. Sharif
Keyword(s):  
Real Time ◽  
Processing System ◽  
Synthetic Aperture ◽  
Synthetic Aperture Sonar

Method of Extracting Real-time Bathymetry Information of Towed Interferometric Synthetic Aperture Sonar System

2021 ◽  
Vol 4 (1) ◽  
pp. 61-66
Author(s):  
Oh-Rum Cha ◽  
Seung-Soo Park ◽  
Jong-Gwon Choi ◽  
Young-Seok Oh
Keyword(s):  
Real Time ◽  
Synthetic Aperture ◽  
Synthetic Aperture Sonar ◽  
Sonar System

Real-time synthetic aperture sonar imaging using a parallel architecture

1995 ◽  
Vol 4 (7) ◽  
pp. 1010-1019 ◽  
Author(s):  
V.S. Riyait ◽  
M.A. Lawlor ◽  
A.E. Adams ◽  
O. Hinton ◽  
B. Sharif
Keyword(s):  
Real Time ◽  
Parallel Architecture ◽  
Synthetic Aperture ◽  
Synthetic Aperture Sonar ◽  
Sonar Imaging

Shadow Detecting and Shadow Interpolation Algorithm for InSAS

2012 ◽  
Vol 605-607 ◽  
pp. 2121-2125 ◽  
Author(s):  
Sen Zhang ◽  
Ming Chen ◽  
Jin Song Tang
Keyword(s):  
Real Time ◽  
Interpolation Method ◽  
Linear Interpolation ◽  
Synthetic Aperture ◽  
Interpolation Algorithm ◽  
Synthetic Aperture Sonar ◽  
Shadow Area ◽  
Linear Interpolation Method

The shadow detecting algorithm based on the coherence and the Sigma filter is used to pick up the shadow of interferometric synthetic aperture sonar (InSAS), which can eliminate small separated shadow areas. To solve the problems such as great computer complexity of traditional Shepard interpolation method and large fluctuant of linear interpolation method for the large shadow area, an improved Shepard interpolation method is proposed. Interpolation boundary is picked up by using diffuse search, and interpolation source is adaptively chosen according to the size of shadow area. The method carries out a perfect tradeoff between performance and computer speed. Lake trial dataset is used to validate the performance of proposed method. The results indicate that the proposed method can eliminate the fluctuant from the linear interpolation method and can process in real time in the InSAS system.

Aided Inertial Navigation System Solutions: Application for Synthetic Aperture Sonar

2006 ◽  
Author(s):  
Ursula Ho¨lscher-Ho¨bing ◽  
Mikael Bliksted Larsen
Keyword(s):  
Real Time ◽  
Navigation System ◽  
Autonomous Navigation ◽  
Inertial Navigation System ◽  
Inertial Navigation ◽  
Synthetic Aperture ◽  
Navigation Systems ◽  
Synthetic Aperture Sonar ◽  
Technical Requirements ◽  
Modern Development

Future naval systems for MCM will include a family of advanced underwater vehicles: AUV’s, towed vehicles, inspection ROV’s, expendable mine disposal vehicles etc. Navigation system technical requirements range from low cost for disposable vehicles in high quantity production to state-of-the-art autonomous navigation in support of AUV’s and high resolution Synthetic Aperture Sonar (SAS) for mine hunting. Using modern development tools and floating point embedded processors it was possible to create a generic implementation of the conventional Aided Inertial Navigation System (AINS) framework. The proven framework and real-time embedded software/hardware ensures optimum fit of navigation systems technical requirements via complete freedom in choice of navigation sensors, aiding techniques and operational procedures. This paper describes the underlying navigation system framework and in particular the first real-time embedded application within an underwater vehicle: Extremely high performance relative navigation in support of SAS processing for detection of buried mines.

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