Fig. 1.

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Blos on March 17, 2022, on the image planes of SDO/HMI (left, at 03:46:35.5 UT) and SO/PHI-HRT (right, at 03:44:09 UT). The blue rectangle on the SO/PHI-HRT image shows the sub-domain that is used for co-registration (see step 2 in Sect. 2.3) and SDM application. The images are not rotated, meaning that solar north is approximately down in SDO/HMI (left) and up in SO/PHI-HRT (right). In both panels, axes are in pixels.

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