Observational conditions and radial velocity shift between the telluric and planetary rest frame for the six nights of WASP-69 b and two nights of KELT-11 b observations. The vertical light shaded regions indicate the ingress and egress, and the dark shaded region shows the transit. The horizontal blue regions in the lower panels show the regions corresponding to a shift between −5 km s⁻¹ and +5 km s⁻¹. In this region, the observation is particularly affected by telluric contamination.