Multiple frequency synthetic aperture sonar

Details Multiple frequency synthetic aperture sonar Multiple frequency synthetic aperture sonar

1981-01-12

1990-08-28

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Echo systems

Side scanning or contour mapping sonar systems

G01S 1500

Patent

active

049531433

ABSTRACT:
A dual frequency, synthetic aperture, sonar system includes a transmitter r projecting insonifying pings alternatively at first and second frequencies and a linear receiving array carried by a vehicle so as to receive returns from said pings. The first and second frequency returns are separated and subjected to processing in parallel channels where they are resolved into in-phase and quadrature components for subsequent phase-error correction, coherent addition, and synthetic aperture beamforming.

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patent: 3928839 (1975-12-01), Warner et al.
patent: 3943482 (1976-04-01), Murphree et al.
patent: 3950723 (1976-04-01), Gilmour
patent: 4088978 (1978-05-01), Gilmour

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