Effects of AL variations in the CCD response on the PSF, and the dependence on CCD gate and device type. The AL FWHM of the integrated effective PSF is plotted as a function of CCD gate, for two devices of TYPE-01 (ROW2 AF4, dot-dashed line) and TYPE-02 (ROW3 AF9, solid line). Each CCD gate spans a range in τ, with the points plotted at the fiducial line positions. The solid squares correspond to FOV1 and the open circles to FOV2. These figures have been generated using the calibrated PSF model rather than directly from the observations.