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Multiple Frequency Synthetic Aperture Sonar.
Patent, Filed 12 Jan 81, patented 28 Aug 90,
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
This patent discloses a dual frequency, synthetic aperture, sonar system includes a transmitter for 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. jhd
APPROVED FOR PUBLIC RELEASE