1. A method of generating an image of a terrestrial region upon which electromagnetic energy from an electromagnetic energy source is incident comprising the steps of: (a) passively collecting electromagnetic energy emitted by said electromagnetic energy source by way of at least one first energy collector; (b) passively collecting, by at least one second energy collector moving among a plurality of distributed energy collection locations, electromagnetic energy emitted by said electromagnetic energy source and scattered by features of said terrestrial region of interest; (c) processing a reference signal representative of electromagnetic energy collected in step (a), in accordance with information representative of the collection geometry of said at least one first energy collector and the geolocation of said electromagnetic energy source, so as to derive a time- and location-corrected reference signal; (d) correlating the time- and location-corrected reference signal derived in step (c) with an image signal representative of electromagnetic energy collected by said at least one moving second energy collector in step (b), so as to derive composite amplitude and phase values of scattering components for plural locations of said terrestrial region as received by said at least one moving second energy collector as a function of spatial position; and (e) processing said composite scattering components derived in step (d) to produce said multidimensional image of said terrestrial region of interest.