Accession Number : ADA306558

Title :   NPS High Resolution Synthetic Aperture Sonar.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Welter, Joseph D.

PDF Url : ADA306558

Report Date : DEC 1995

Pagination or Media Count : 114

Abstract : This thesis investigated the use of synthetic aperture techniques to achieve a long effective aperture, high resolution, imaging sonar. The approach included a full simulation of the system using the MATLAB programming environment that provided a model for developing six data processing algorithms and a working 25KHz, 1 m baseline, air medium synthetic aperture sonar. The six azimuthal processing techniques included: (1) a normal, real aperture, (2) an unfocussed synthetic aperture, (3) a hybrid focussed-unfocussed system, (4) a fully focussed one line algorithm, (5) a limited two-dimensional, fully focussed algorithm and, (6) a limited two-dimensional, hybrid focussed-unfocussed algorithm. This thesis compared the run times, resolutions and signal to noise ratios achieved by the six techniques both in simulation and experimental measurements collected with the actual prototype.

Descriptors :   *IMAGE PROCESSING, *MINE DETECTION, *SYNTHETIC APERTURE SONAR, COMPUTER PROGRAMS, ALGORITHMS, COMPUTERIZED SIMULATION, SOFTWARE ENGINEERING, SIGNAL TO NOISE RATIO, THESES, HIGH RESOLUTION, ACOUSTIC IMAGES, AZIMUTH, UNDERWATER MINES.

Subject Categories : Cybernetics
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE