Average detector positions for arrays A1, A3, and A2. The three plots show the detectors that met the selection quality criteria for at least two beammaps during two technical campaigns. These consist of 952, 961, and 553 detectors for A1, A3, and A2, respectively. The colour indicates how many times a KID was identified as valid on a beammap, ranging from blue for the KIDs valid in at least two beammaps, to red for the KIDs valid in all (ten) beammaps. The inner and outer dash-line circles correspond to circular regions of 5.5 arcmin and 6.5 arcmin, respectively. Units used are arcseconds.