The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 15, 1977
Filed:
Feb. 27, 1968
George R Lanning, Corona, CA (US);
John Y Chang, Riverside, CA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A passive ranging system for determining the range of a target radar by uizing 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/K.DELTA.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.