Top: Doppler map of quiet sun granulation observed with SST/CRISP at Fe i 6302 Å. The image gray scale is clipped to  ± 1500  m  s^-1. Bottom-left: spatially-averaged profile computed along the image shown in the top panel. The density map represents the spatially-resolved profiles corrected for instrumental cavity errors. The average profile was computed using a least squares fit of all the points to a spline, consisting of 10 parameters. Bottom-right: bisector of the observed spatially-averaged profile. The velocity calibration was carried out using our synthetic profile convolved with the CRISP instrumental profile.