Research/Patents/US 4961174
US 4961174

HIGH DATA RATE CONTINUOUS WAVE TOWED SONAR

Assignee

Filed

May 9, 1977

Granted

Oct 2, 1990

Location

Abstract

A continuous wave, doppler sonar has an underwater towed portion including projector disposed vertically displaced from a multi-element receiving array. Received CW signals are processed for spillover elimination and subjected to phase lock loop tracking filters for reverberation and target doppler prior to target signal detection, thresholding, multiplexing and transmission to the towing portion. The target signals are distributed as to azimuth, recirculated in a memory, and reiteratively displayed in PPl format, with periodic updating.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Mar 3, 1982

Rescinded

May 4, 1990

Duration

8 years, 2 months

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records