Accession Number : ADD007639

Title :   Zero-Doppler Shift Positioning Technique.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Hannigan,Joseph E

Report Date : 13 May 1980

Pagination or Media Count : 14

Abstract : A system for locating forward observation posts with respect to a base station. A continuous electromagnetic wave with frequency f0 is transmitted from an artillery projectile or missile in flight. In addition, a relative time code is transmitted on the same or a separate carrier frequency either from the projectile or from a ground station. The frequency f0 of the electromagnetic wave from the projectile or missile is doppler shifted above or below its basic frequency due to the velocity of the projectile. This doppler signal fd always goes through its basic frequency f0 or zero doppler at a point which is representative of and identifies an observer's position in the horizontal or subtrack direction of the projectile. (Author)

Descriptors :   *Patents, *Position finding, *Doppler systems, *Artillery ammunition, Radio stations, Continuous waves, Military facilities, Ground stations, Projectiles, Electromagnetic radiation, Doppler effect

Subject Categories : Guided Missiles
      Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE