Figure 5

Different forms that can be used to shape the migration operator aperture in order to resemble the real radar footprint; (a) and (b) are applicable to the one-step 3D operator to simulate a monostatic and a bistatic footprint, respectively; (c) is the aperture of the two-step operator obtained with a trivial 2D aperture limitation applied to both the x and y-direction steps; (d) is the aperture of the two-step operator that can be obtained with a smooth weighting approach to resemble a shape similar to (b).