Exogenous modelling of non-Gaussian clutter

Non-Gaussian clutter is conveniently described by exogenous models (i.e. by the interaction of two mutually independent random processes) that include, as a special case, the multiplicative models. These take into account the physics of the phenomenon and are shown to fit in a simple way a large class of amplitude distributions. The random processes resulting from these models are found to be a generalization of the spherically invariant ones, or SIRPs, to which they reduce when the radar illuminates a stationary reflecting patch as during the dwell time of an electronically scanned antenna.