Observing conditions during Night 1 and Night 2 as a function of phase (phase = (BJD − T_c)/P, where BJD is the barycentric Julian date, T_c = 2458926.5 days is the mid-transit time, and P = 2.724033 days is the period, which are all from Lendl et al. 2020). The top panel and mid panel illustrate the airmass and the average atmospheric Dimm seeing evolving during the nights, respectively. The Dimm seeing is averaged for each observations (i.e. average between the start and the end of each observation). The bottom panel shows the S/N (extracted from the fits header) changing during the nights.