Expanding area search experiments
Washburn, Alan R.
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The formula 1 - exp (-(VW/pi U squared) (1/tau - 1/t)) is often used to approximate the probability of detecting a target with speed U by time t if the search does not start until time tau and the searcher's speed and sweep width are V and W, respectively. This report shows some experimental evidence that the formula is an imperfect but reasonably good approximation to what actually happens when the target is evasive
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NPS Report NumberNPS55-80-017