All sky dirty image of the simulated NCP dataset (left), with zoom-in to the NCP main field (top right) and the Cyg A direction (bottom right). The all sky image has been obtained using a baseline range of 50 − 250λ, the NCP zoom-in with 50 − 500λ, while the Cyg A zoom-in with 50 − 4500λ. A natural weighting scheme has been used for the all sky and the NCP zoom-in images, whereas a uniform weighting has been chosen for the Cyg A zoom-in to make the source structures more visible. The contour in the bottom right panel is the 1 Jy/beam level from Fig. 1 to show the position and extension of Cyg A.