Fig. 8.

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Standard deviation, σ, of the pixel-by-pixel evolution between the classic SDO/HMI and the weighted synoptic maps for different weight functions from wd = 5% to 55% residual contribution at the adjacent central meridians. The dashed line shows the result for equally weighted HMI-like averaging of the low-cadence observation (see first paragraph of Sect. 2.5).

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