Pointing analysis. Diamonds (resp. squares) show the chromatic amplitude (top), frequency (middle) and phase (bottom) coefficients derived east (resp. west) of the meridian from the fit to individual exposures, plotted as a function of orbital phase. The meridian crossing is indicated as a vertical dotted line. Bottom subpanels show residuals between the measurements and their best-fit pointing coordinate model (dashed black curves). The blue and orange boxes correspond to the first and second wiggle components.