Observing conditions as a function of phase. The blue, orange, yellow, and green points correspond to NIRPS (and simultaneous HARPS) observations, while the pink and black points represent CRIRES+ observations in the H- and K-bands, respectively. Top panel and mid panel illustrate the airmass and the average atmospheric Dimm seeing (i.e. value for the differential image monitor) 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 signal-to-noise ratio (extracted from the fits header) changing during the nights.