Two-Stage Target Tracking System and Method.
Patent, filed 17 Jun 92, patented 25 May 93,
DEPARTMENT OF THE NAVY WASHINGTON DC
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An apparatus and method for tracking maneuvering and non-maneuvering targets in the presence of stochastic acceleration are provided. The apparatus and method utilize a two-stage Kalman estimator, the first stage of which is a bias-free filter providing target position and velocity estimates, and the second stage of which is a bias filter providing estimates of target acceleration. These two filters act together to provide parallel processing calculations thereby achieving high speed target state determination. During target maneuvers, the output of the second stage is used to correct the output of the first stage. In the absence of maneuver, the second stage is turned off and the first stage provides the target position and velocity estimates.
- Target Direction, Range and Position Finding