Figure 2.

Illustration of data acquisition scenarios being considered. (a) Full aperture case for an $8\times 8$ grid of scan locations. (b) Sparse aperture case: The data are collected from the marked locations that are irregularly and randomly distributed over the full support of the $8\times 8$ grid. (c) Reduced aperture case: Marked scan locations concentrated in the center of the full aperture are obtained by uniformly decreasing the aperture support in each dimension.