Temperature gradient measured on five snapshots of the simulation with ⟨B ⟩ ≃100 G using the FeI 630.15 nm line under bad seeing conditions (r₀ = 5 cm). The light-blue full line shows the temperature gradient derived from the simulation. Red dots: measurements at μ = 0.9, green dots: measurements at μ = 0.8, blue dots: measurements at μ = 0.7. The error bars show the one-sigma uncertainty on the depth measurements. Upper panel: with AO, lower panel: without AO.