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Proceedings Paper

A target tracking algorithm that reduces designation time for laser guided weapons
Author(s): Barry G. Sherlock; Yogendra P. Kakad; Bryan J. Freeman
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Paper Abstract

We propose a new approach for laser guided weapon guidance that minimizes the total active laser target designation time. The weapon makes use of inertial or GPS guidance within a Kalman filtering framework, and maintains covariance information indicating the uncertainty of its knowledge of the weapon-to-target vector. At any time, the missile needs to be sure that it can navigate to any point within the area around the target that is described by this covariance. Therefore, at each moment during the flight, there exists a covariance threshold above which the weapon cannot guarantee its ability to navigate to the target. This threshold will decrease with time as the weapon-to-target distance decreases. In our proposed approach, when the threshold is exceeded, the weapon requests a brief laser designation of the target. The laser designation provides an accurate measurement of the bearing of the target with respect to the missile, and this is used to improve the estimate of the weapon-to-target vector. In turn, this can be fed back into the Kalman filter to improve the internal state estimate. By minimizing laser designation time, this approach reduces the chance of compromise of the designation agent, and of the fact that targeting is taking place. It also achieves the benefit of improving the accuracy of the underlying inertial or other navigational system, or alternatively the estimate of absolute target position.

Paper Details

Date Published: 19 May 2005
PDF: 8 pages
Proc. SPIE 5810, Acquisition, Tracking, and Pointing XIX, (19 May 2005); doi: 10.1117/12.602597
Show Author Affiliations
Barry G. Sherlock, The Univ. of North Carolina at Charlotte (United States)
Yogendra P. Kakad, The Univ. of North Carolina at Charlotte (United States)
Bryan J. Freeman, Naval Surface Warfare Ctr. (United States)

Published in SPIE Proceedings Vol. 5810:
Acquisition, Tracking, and Pointing XIX
Michael K. Masten; Larry A. Stockum, Editor(s)

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