Ground-based RVs validation. Upper panel: scatter plot of the average surveys RV epochs as a function of the median Gaia RV value $(\widehat{\text{RV}}-\langle \text{RV}\rangle )$. Lower panel: half the peak-to-peak variation in the surveys’ RV epochs as a function of the estimated spectroscopic semi-amplitude $\left(K_1^{*}-\text{ΔRV}/2\right)$. Violet points mark sources observed by LAMOST, green points sources observed by GALAH, and red points sources observed by APOGEE. Dashed black lines mark a 1:1 relation.