Fig. 1.
Overview of magnetic field mapping. Top panel: GONG radial field magnetogram used as input to PFSS modelling. Black lines show magnetic field lines traced through the PFSS solution from the source surface to the solar surface. Bottom panel: synoptic AIA 195 Å EUV map, with overplotted contours showing the open field regions of the PFSS model. The white and associated labels identify the three solar wind source regions discussed in the text.
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