Fig. A.1
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Differences in Teff, log g, and [Fe/H] between earlier and later data releases of three major spectroscopic surveys. Top: APOGEE DR16 vs DR17 (orange) and SoS-Spectro vs DR17 (blue); middle: GALAH DR2 vs DR4 (magenta) and SoS-Spectro vs DR4 (blue); bottom: LAMOST DR5 vs DR10 (pink) and SoS-Spectro vs DR10 (blue). Square markers denote internal survey updates, round markers show differences with SoS-Spectro, and shaded regions represent the interquartile range of residuals. These comparisons reveal that the SoS-Spectro discrepancies are of similar or smaller scale than the internal changes across survey versions.
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