Fits obtained by the coupled inversions to the observed Stokes profiles. Panel a shows the continuum image of AR 11158 when it was located at μ ≈ 0.6. Columns 2 to 5 show the observed Stokes profiles (dotted gray lines), the retrieved fits obtained by the coupled inversions (colored lines), and the ME inversion by MERLIN (black lines). Vertical black bars mark the spectral windows that MERLIN uses for the Level-2 inversions. The locations of the plotted profiles are marked on the continuum images with colored symbols. λ₀ = 6302 Å.