Continuum-normalised light-curve, air mass, radial velocity (RV) correction (containing RV contributions of the barycentric Earth motion and the stellar systemic velocity), and peak S/N per velocity bin over the course of the transit of WASP-76 b as a function of the orbital phase (from top to bottom), computed using the parameters listed in Table 1. The grey band indicates the transit duration of the planet, from first to fourth contact. The horizontal dashed line in the bottom panel represents the average value of the peak S/N.