1. A method of determining the actual location of an emitter by an array of sensors, each sensor detecting signals from the emitter, comprising the steps of: (a) measuring a set of signals from the emitter at an initial location of the array of sensors to determine data indicative of emitter site location; (b) determining estimates of all emitter site locations possible, within measurement error of the sensor array, associated with the measured data; (c) determining a probability, based on predetermined data, for each possible emitter site location estimates that each possible location estimate is the actual emitter site location; and (d) generating an estimate of the actual emitter site location based on the probabilities determined in step (c).