Comparison of drift scan CB maps (201028) with GP CB maps. Left: the grey scale map shows the drift scan CB maps. Blue contours show the drift scan data and orange contours show the GP data. Contour levels are the same for both data sets: 0, 0.1, 0.3, 0.5, 0.7, and 0.9. Right: ratio of drift scan CB maps to GP CB maps. Contours are: 0, 0.2, 0.4, 0.6, 0.8, 1, 1.2, and 1.4. The red dashed circle marks 36′ from the centre, which indicates the approximate FWHM for the beams.