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Fig. 1

image

Synoptic GONG magnetograms during solar cycle maximum, CR 2159 (top left) and cycle minimum, CR 2087 (top right) followed by the spherical harmonic reconstructions with lmax = 150, 20, 10, and 5 respectively (second row to bottom). The magnetic maps are saturated to different values of Br, to highlight the surface magnetic features.

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