Synoptic Chart of Magnetic Field from MDI Magnetograms J. T. Hoeksema, Y. Liu, X.P. Zhao, A. Amezcua Stanford University Synoptic charts (standard) For each magnetogram, we correct for For each magnetogram, we correct for Offset; Offset; Remove spike pixels (cosmic ray); Remove spike pixels (cosmic ray); MDI saturation correction (in planning); MDI saturation correction (in planning);in planningin planning Rescaled by applying UCLA rescaling mask to every magnetogram; Rescaled by applying UCLA rescaling mask to every magnetogram; Line-of-sight to radial. Line-of-sight to radial. In remapping processing, In remapping processing, A cubic interpolation is employed; A cubic interpolation is employed; B0 angel corrected; B0 angel corrected; Correction for differential rotation. Correction for differential rotation. Synoptic charts Synoptic charts Remaining uniform effective integration time for every pixel (20 effective points, and 60 degree selection window size); Remaining uniform effective integration time for every pixel (20 effective points, and 60 degree selection window size); Polar field interpolation (more detail). Polar field interpolation (more detail).more detailmore detail Comparison between the original and update maps (CR1988) Comparison between the original and update maps (CR2041) Variance along the longitude (left) and latitude (right). Comparison between MDI and WSO Comparison between WSO and MDI