Imaging systems and associated methods are described. According to one aspect, an imaging system includes processing circuitry configured to: access radar data for a plurality of sampling points at a plurality of different locations of an imaging aperture, and wherein the radar data results from the transmission and reception of electromagnetic energy via an antenna array with respect to a target imaging volume; access a plurality of different weightings that correspond to different ones of the sampling points of the imaging aperture; focus the radar data of the sampling points to generate an image of the target imaging volume; and wherein the processing circuitry is configured to use the different weightings of the sampling points to focus the radar data of respective ones of the sampling points.