Results for a single chunk (chunk index 9) of a Solar-SONG observation, centered around three Fe I-lines around 5195.5 Å. Left: spectrum and best-fit model components. Right top: zoom-in on a 30 min window of the chunk’s best-fit velocity time series (blue), along with a smoothed time series (orange), and the detrended combined RVs as in Fig. 3 (green). Right bottom: power spectra of the full 2 hr time series of chunk-9 velocities (blue) and the combined detrended RVs (green).