Pre-launch simulated effective PSFs (using GIBIS simulator, see Babusiaux et al. 2011) of a red source (V−I = −0.5 mag) and nominal (mean) AC scan motion for AF S1R1, S5R1, S9R1, S1R4, S5R4, S8R4, S1R7, S5R7 and S9R7 of telescope 2 (starting in the top left corner), meaning S the strip and R the row position of the CCD in the focal plane respectively. These PSF variations with the focal plane position are also dependent on the colour of the source and the FoV.