Borcea, LilianaMoscoso, MiguelPapanicolaou, GeorgeTsogka, Chrysoula2021-03-262021-03-262016-01-01Borcea, L., Moscoso, M., Papanicolaou, G. and Tsogka, C. (2016). Synthetic Aperture Imaging of Direction- and Frequency-Dependent Reflectivities. SIAM J. Imaging Sci., 9(1), 52–811936-4954https://hdl.handle.net/10016/32243We introduce a synthetic aperture imaging framework that takes into consideration directional dependence of the reflectivity that is to be imaged, as well as its frequency dependence. We use an l(1) minimization approach that is coordinated with data segmentation so as to fuse information from multiple subapertures and frequency subbands. We analyze this approach from first principles and assess its performance with numerical simulations in an X-band radar regime.eng© 2016, Society for Industrial and Applied MathematicsSynthetic aperture imagingReflectivityMinimal support optimizationsSimultaneous sparse approximationMultiple-measurement vectorsConvex relaxationOptimizationAlgorithmsresearch articleBiología y Biomedicinahttps://doi.org/10.1137/15M1036063open access52181SIAM Journal on Imaging Sciences9AR/0000017952