These are a few demonstrations of the program's capabilities. Imaginary part, displayed at the same scale and set on a baseline to show both positive and negative excursions. Top Cuppen image, real part. In this case, using a merging filter at each iteration produces the smallest artefact.
Apparent resolution is high, but there are ringing artefacts at edges.
Left to Right Margosian image without final phase-correction. Much of the apparent structure is due to the complex peakshape. Margosian image after final phase correction. Not at all flat, especially near edges. Top Cuppen image without final phase correction.