Total complex visibility on a certain baseline due to the contribution of all strong sources shown in Fig. 5. The ones that contribute through non-identical sidelobes introduce non-redundancy or systematic errors into the total redundant visibility. This has been demonstrated in a complex plane on the right. The solid line shows the visibility vectors as they were observed through hypothetically identical sidelobes. The dotted line shows the visibility vectors when they are attenuated differently by the actual non-identical sidelobes.