Patent ID: 6421116
Filing Date: 2002-07-16
Classification: F41G

Abstract:
A method for determining the relative movement between a target tracking missile and a target being located at a target distance from said missile and moving with a target velocity relative to said missile, said missile being provided with an image processing seeker head provided with a seeker detecting said target, said seeker head observing the target in an observation direction, a target image having a target image dimension being generated on said seeker when said seeker detects said target and depending on said observation direction, said method comprising the steps of:defining a seeker head fixed coordinate system; defining a maximal absolute size of said target; measuring further relevant quantities; and running a recursive algorithm in order to obtain estimated values for a three-dimensional vector of said target velocity in said seeker head-fixed coordinate system, using as inputs said defined maximal absolute size of said target and said image dimensions generated on said seeker as well as said further relevant quantities.