Method and apparatus for target imaging with sidelooking sonar

Details Method and apparatus for target imaging with sidelooking sonar Method and apparatus for target imaging with sidelooking sonar

1984-05-23

1996-09-10

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Echo systems

Side scanning or contour mapping sonar systems

367 7, 367 11, 367100, G03B 4206

Patent

active

055555322

ABSTRACT:
A method and apparatus for imaging underwater targets utilizing sidelooking onar. 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.

REFERENCES:
patent: 3271765 (1966-09-01), Pulford
patent: 3484737 (1969-12-01), Walsh
patent: 3980983 (1976-09-01), Shannon
patent: 4262344 (1981-04-01), Gilmour
patent: 4287578 (1981-09-01), Heyser
patent: 4288866 (1981-09-01), Sackman
patent: 4355311 (1982-10-01), Frosch

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