The original non-uniform data is reconstructed onto a highly
sampled uniform grid for every measured frequency. The
algorithm is described in detail in [10]. It is a Fourier-based
regularization technique that uses the 2D bandwidth as the
regularization parameter in search of the best reconstruction
and spectral estimate. The initial estimate for the bandwidth (
B π /95.0 Δ= ) is obtained from the mean measurement
spacing (Δ). As such, it does not require a priori knowledge of
the scene being imaged