Patent ID: 7121502
Filing Date: 2006-10-17
Classification: F41G,G01S

Abstract:
1. A guidance system for guiding each projectile of a plurality of projectiles towards a moving target, said guidance system comprising: a platform having a radar system on said platform for tracking said moving target and illuminating said moving target with a radar signal; a plurality of timing signal sources for transmitting timing signals, each of said timing signal sources located at a known spatial position; each projectile of said plurality of projectiles having a receiver for receiving said radar signal reflected from said target and for measuring a frequency shift of said radar signal reflected from said target, said reflected radar signal shifted in frequency because of motion of said moving target with respect to each projectile of said plurality of projectiles; each projectile of said plurality of projectiles having a transponder to receive said timing signals and generate reply signals in response to said timing signals, said reply signals received by platform, said reply signals including an identity of said each projectile of said plurality of projectiles generating said reply signals; each projectile of said plurality of projectiles having a projectile datalink transceiver for establishing a data link to said platform, said data link carrying information descriptive of said frequency shift of said radar signal reflected from said target; a receiving antenna on said platform for receiving said reply signals; a computer for computing a relative position of each projectile of said plurality of projectiles with respect to said target from tracking said moving target using said radar system, said information descriptive of said frequency shift, and said reply signals.