Images showing a direction-dependent self-calibration sequence for facet calibrators from the different fields. The corresponding field name is indicated in the images of the first column. The first column displays the images made with only the DI self-calibration solutions. The central column displays the improvements after two iterations of fast phase (TEC and phase-offset)-only DDE calibration. The right-hand column shows the improvement after two further iterations of fast phase (TEC+phase offset) and slow phase and amplitude (XX and YY gain) DDE calibration. The scale is the same for all images of the self-calibration sequence.