Accession Number : ADD003959

Title :   Method and Apparatus for Interrogating and Identifying Fixed or Moving Targets.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON D C

Personal Author(s) : Siverhus ,Ardell V ; Matava,Joseph A ; Klose,Dirk R

Report Date : 29 Mar 1977

Pagination or Media Count : 8

Abstract : Hijacked vehicles, or the like, are identified by Illuminating a transponder mounted to the vehicle by a beam of microwave energy, e.g., from a helicopter flying over the traffic. The transponder includes non-linear diodes which reradiate a signal back towards the helicopter. Means are disclosed for modulating the return signal with a 16-bit identification code, each bit of which is transmitted as a 31-bit pseudo-random code.

Descriptors :   *Patents, *Transponders, *Theft, *Interrogator transmitters, Ground vehicles, Trucks, Helicopters, Moving targets, Illumination, Airborne, Law enforcement

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE