15 July 1999 Probability of target acquisition by seeker in circular scan considering dwell time requirement
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Abstract
The acquisition of moving target by an active seeker requires detection and confirmation of target leading to lock-on and tracking subsequently. The probability depends on the probability of detection and that of sighting the target in the seeker beam such that the target remains in the beam for a finite time called dwell time. The dwell time is necessary to process the signals for the confirmation of target. In order to improve upon the probability of sighting the target without search, a circular scan is generally carried out. This is accomplished by deflecting the seeker beam by half the beam width and making one rotation. This causes the beam to sweep the target and the sweep speed depends on the location of the target with respect to the point of rotation of the beam. In this paper, first the dwell time is evaluated for the circular scan in a 3D engagement. The probability of sighting the target is then worked out for a given pointing accuracy of the beam. Finally, the probability of acquisition is found as the product of the probability of detection and that of sighting the target.
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Chandra B. Asthana, Chandra B. Asthana, } "Probability of target acquisition by seeker in circular scan considering dwell time requirement", Proc. SPIE 3692, Acquisition, Tracking, and Pointing XIII, (15 July 1999); doi: 10.1117/12.352877; https://doi.org/10.1117/12.352877
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