The visibility of stationary and moving targets in the plane subject to a Poisson field of shadowing elements
M. Yadin, Shelley Zacks · Journal of Applied Probability · 1985
A methodology for an analytical derivation of visibility probabilities of n stationary target points in the plane is developed for the case when shadows are cast by a Poisson random field of obscuring elements. In addition, formulae for the moments of a measure of the total proportional visibility along a star-shaped curve are given.