Accession Number : ADD000151

Title :   Close-In Ranger System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Bishop,Wilson P

Report Date : 22 Jan 1974

Pagination or Media Count : 7

Abstract : The patent describes a range measuring system wherein a transponder at a remote location is interrogated by coded signals from a base location. If the interrogation is correctly coded the transponder replies. Receipt of a correct reply interrupts the generation of a ramp voltage at the base location. The ramp voltage is measured to determine the range from the base to the transponder. Novel circuitry including a ramp current generator, selectively variable impedance input range switch means, a selectively variable initial voltage ramp set range switch means, shaper gate means, is provided to obtain superior accuracy in range measurements.

Descriptors :   *Range finding, *Patents, Transponders, Coding, Signals, Pulses, Airborne, Interrogators

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE