Échelle diagram showing the best mode match for the subgiant target KIC 4346201 used to determine σ _ν,eff. The best seismic model is determined by minimizing Equation (9) for all models in the downselected grid (with σ _ν,eff set to zero). The observed modes are shown with open circles, and the surface-corrected modes of the model are shown with dots. Each observed mode is connected to its corresponding model mode with a line. The colors of the points and lines indicate the angular degree of the modes (ℓ = 0 in blue, ℓ = 1 in orange, and ℓ = 2 in gray.)