WSO prediction of coronal radial field (in μ Tesla) using PFSS model with source surface distance at 2.5 Rs. Magnetic north (A sector) is depicted in blue and south (T sector) in red. Data were averaged over one solar rotation. Only values around equator are shown. Variable black line denotes the location of field minimum as a proxy of the rotationally averaged HCS. Straight horizontal line denotes the equator.
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