Potential field source surface B² contour maps and solar wind magnetic foot-points along Solar Orbiter trajectories (red) for the selected intervals. The projection of the s/c location (squares) on the source surface (crosses) and down to the solar wind source region (circles). The maps are magnetic pressure iso-contours calculated for the heights R = 1.2 R_⊙ and R = 1.1 R_⊙ (chosen to make the magnetic field contours clearer). The crosses result from ballistic mapping using the measured in situ solar wind speed ±80 km/s in bins of 10 km/s. Open magnetic field regions are shown in green (positive polarity) while the neutral line is in black bold.