Distribution of the estimated AL (left) and AC (right) source locations relative to their ground truth values, obtained from selected 2D observations in the CCD in row 5 AF5 and corresponding to FOV1 (FOV2 is depicted in Fig. 16). The dot-dashed orange line corresponds to the recalibrated DR3 PSF model and the green line corresponds to the DR4 PSF model. In the top row, observations from CCD gates 410 have been merged; these are the least affected by the updated PSF model. The second, third, and fourth rows correspond to observations from gates 11, 12, and 0, respectively, as indicated in the upper left corner. The plots are normalised to unit area, so the vertical scale is arbitrary and omitted for clarity.