Detailed view (left column) of B_LOS/μ for a selected area in SO/PHI data at the limb and in SDO/HMI close to disc centre, after re-projection to the limb. The right column shows examples of B_LOS/μ along cross-sections marked by the lines in the maps on the left. In the right panels, the different curves are offset by 300 G in ordinate for better visibility (the respective 0 G is marked by the horizontal lines).