Changing ramp shapes due to fringe peaks and troughs in band 1A. We show the subsequent frame difference, divided by the mean of the first six frames ($\frac{{\text{DN}}_{i+1}-{\text{DN}}_i}{\overline{\text{ΔDN}}}$) to normalise the data for visualisation purposes. The first six frames are chosen to still probe an approximately linear part of the ramp. A perfectly linear ramp should then be centred around 1. The stronger the deviation from linearity, (1) the less straight the ramps are, and (2) the quicker they diverge from unity. Cases shown in the panels from left to right correspond to the blue (left), orange (centre), and green (right) ramps in Fig. 5, respectively. From left to right, the contrast between the bright central pixel and a neighbour decreases, and the ramps converge to similar shapes. The ramps in the wings for the high-contrast cases show the typical rate-space BFE signature. The point of saturation per ramp is indicated by a red dot on the ramp.