Accession Number : ADD007576

Title :   Method for Classification of Sonar Echoes.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Padberg,Louis R , Jr ; Parker,Frederick D ; Schaniel,Carl L , Jr ; Kleager,Kenneth D

Report Date : 15 Jun 1980

Pagination or Media Count : 10

Abstract : A method for distinguishing between submarine and non-submarine sonar targets comprising the steps of producing a series of permanent displays of sonar target echoes having fixed electrical characteristics of projecting a beam of energy pulses of more than one and less than ten milliseconds duration toward a known submarine target of predetermined range along a number of converging paths, then transmitting a succession of energy pulses of the same duration toward an unknown target along a number of converging paths, producing successive signals of durations which successively vary in accordance with the extent of said target along consecutive pulse paths, indicating the maximum and minimum signal duration, and gating a series of sonar echo displays responsive to the same electrical characteristics as those producing the permanent displays, of said unknown target between said maximum and minimum signal duration whereby a homologous echo production of the permanent displays is obtained only when said echo is from said submarine type. (Author)

Descriptors :   *Patents, *Sonar echoes, *Target classification, Underwater targets, Submarines, Acoustic detection, Sonar pulses, Short pulses, Signal processing, Display systems, Oscilloscopes, Scanning, High rate, Optical images, Shape

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE