Curtis W Symansky

US Patent:

40991806, Jul 4, 1978

Filed:

Mar 2, 1977

Appl. No.:

5/773624

Inventors:

Murray Kupersmith - Commack NY
Curtis W. Symansky - Freeport NY

Assignee:

General Signal Corporation - Rochester NY

International Classification:

G01S 956

US Classification:

343 65R

Abstract:

Apparatus is provided for modifying a conventional target locating system in which targets respond to an interrogation signal by transmitting a reply, and the target location is deduced from the azimuth from which a reply is received and the delay between the interrogation signal and the reply. The improvement includes a controllable attenuator coupling the receiving antenna to the target locating system which is controlled to selectively discriminate against selected range cells at selected azimuths. In a preferred embodiment, digital circuitry is relied upon to control the attenuator, and the identication of the range cells to be discriminated against is stored in a digital memory.