Top panels: WSO magnetic field computations for Carrington rotations 2262 and 2263. The east and west limbs of the Sun are indicated by blue arrows. The dashed vertical line points out the Carrington longitude of Solar Orbiter with respect to the Earth, at the epoch of observations. Bottom left panel: LASCO C2 white-light coronal streamer structures at r = 4.5 R_⊙ during CR 2263. Bottom right panel: Boundaries between open field regions at the source surface (r = 2.5 R_⊙). The solid thick white line represents the source-surface neutral line (corresponding to the heliospheric current sheet), which separates holes of opposite polarity, and the thin gray lines mark the locations of pseudo-streamer plasma sheets, which separate holes with the same polarity. The values [90°, 0°, and –90°] of the latitudinal scale reported in the vertical axes match the polar angle values [360°, 270°, and 180°], respectively.