Comparison of the atomic parameters, log(gf) and Δλ, for mode 2 and 3 inversions. Top panel: the y-axis shows the difference between inferred log(gf)_inv and exact log(gf)₀ values where on the x-axis we plot the line core depth. The averaged values in mode 2 are marked in circles and the values from mode 3 in triangles. Markers are coloured based on the Δλ parameter. The top of the panel lists mean Δ and standard error σ of log(gf)_inv − log(gf)₀ for each mode. The error bars are displayed only for mode 2, marking the 1σ level. Mode 3 retrieves a unique global value for each line, and we do not have any measure of error in this case. Bottom panel: the comparison of log(gf)_inv − log(gf)₀ with the line blending factor listed in Table 1. Markers shape and colour have the same meaning as in the top panel.