Accession Number : ADD018261

Title :   Method and Apparatus for Target Imaging with Sidelooking Sonar.

Descriptive Note : Patent, Filed 23 May 84, patented 10 Sep 96,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Sacha, John R

Report Date : 10 Sep 1996

Pagination or Media Count : 12

Abstract : A method and apparatus for imaging underwater targets utilizing sidelooking sonar. A sonar pulse consisting of a concatenated series of subpulses is transmitted. The echo return is match filtered against each of the subpulses to produce a series of range doppler maps, each providing information in a different direction. The range doppler maps are normalized, thresholded, and intersected, thereby yielding data points which describe the target outline. Information as to the target length, width and orientation can be computed from the target outline data.

Descriptors :   *SONAR SOUND ANALYZERS, *PATENTS, *SIDE LOOKING SONAR, MATCHED FILTERS, UNDERWATER TARGETS, SONAR IMAGES, SONAR PULSES, DOPPLER SONAR

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE