Raw images from the G102 (top panel) and G141 (bottom panel) observation sequences. Each shows the second forward scan of the second orbit, which is the first data set used in this analysis. In both cases, the left-hand image shows the final read while the middle image displays the penultimate (non-destructive) read. The right-hand image shows the flux levels when the penultimate read is subtracted from the final one. The regions of negative flux highlight the persistence effect for these data sets. The colour scale for this right-hand image differs from the others in this figure.