Accession Number : ADD003828

Title :   Passive Ranging System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Lanning,George R ; Chang,John Y K

Report Date : 15 Feb 1977

Pagination or Media Count : 6

Abstract : The patent describes a passive ranging system for determining the range of a target radar by utilizing the scan characteristics of the target radar. Receivers are placed on each of two aircraft flying in a specified formation. One aircraft relays detected pulse amplitude envelopes to the other aircraft. The second aircraft measures time delay between impacts of the main beam of the target radar on the two aircraft and a computer determines range according to equation R=D/Kdelta t where delta t is the measured time difference, D is the distance between aircraft and K is a constant depending on the type of target radar.

Descriptors :   *Patents, *Range finding, *Radar equipment, Airborne, Passive systems, Radar receivers, Radar targets, Radar signals, Delay, Time, Measurement

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE