Described is a method for extraction of a region of interest (ROI) from a composite synthetic aperture radar (SAR) phase history data. The method comprising receiving, with a system comprising a processor, the composite SAR phase history data of a plurality of backscattered return signals produced by a SAR system illuminating a scene with a SAR beam. The method also comprises obtaining a location of a first ROI within the scene and extracting from the composite SAR phase history data a first component SAR phase history data corresponding to the ROI at the location of the ROI.

A process and systems for constructing arbitrarily large virtual arrays using two or more collection platforms (e.g. AUX and MOV systems) having differing velocity vectors. Referred to as Motion Extended Array Synthesis (MXAS), the resultant imaging system is comprised of the collection of baselines that are created between the two collection systems as a function of time. Because of the unequal velocity vectors, the process yields a continuum of baselines over some range, which constitutes an offset imaging system (OIS) in that the baselines engendered are similar to those for a real aperture of the same size as that swept out by the relative motion, but which are offset by some (potentially very large) distance.

A synthetic aperture radar (SAR) image of a target is produced. The production involves a mobile communication device and comprises causing a SAR image process to be performed, wherein the SAR image process comprises a plurality of SAR process actions including obtaining SAR data by operating a transceiver of the mobile communication device to receive reflections of a radar signal transmitted at each of a plurality of different positions of the mobile communication device relative to the target, and producing the SAR image from the SAR data. Causing the SAR image process to be performed includes causing the mobile communication device to perform a first set of the SAR process actions; and causing the one or more nodes in a network to perform a second set of the SAR process actions. Allocation of the SAR process actions between the first set of the SAR process actions and the second set of the SAR process actions is based on an evaluation of one or more criteria.