Expanding Area Search Experiments
Alan R. Washburn · 1980
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