Communications – electrical: acoustic wave systems and devices – Echo systems – Side scanning or contour mapping sonar systems
Patent
1966-12-08
1990-07-03
Tarcza, Thomas H.
Communications, electrical: acoustic wave systems and devices
Echo systems
Side scanning or contour mapping sonar systems
367101, G01S 1500
Patent
active
049396994
ABSTRACT:
A sonar system having a sonar transmitter which is programmed to broadcast wo sets of several increasing frequency signals, with the frequency gap between each set thereof sufficient to cause them to distinguish between deep and shallow water targets, respectively. A heterodyne receiver receives target echoes of said sets of several frequency signals and converts them to two sets of identical frequency signals which are then readout as a single continuous target display signal.
REFERENCES:
patent: 3064234 (1962-11-01), Barrett
patent: 3324469 (1967-06-01), Szerlip
McLeroy Edward G.
Murphree Francis J.
Warner Henry L.
Becker John
David Harvey
Pihulic Daniel T.
Sheinbein Sol
Tarcza Thomas H.
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