SOHO/MDI Magnetograms of Solar Active Regions

The dataset includes level 1.8 full-disk MDI magnetograms with 2′′ per pixel taken from the mdi.fd M 96m lev182 series of JSOC. HMI magnetograms with 0.5′′ per pixel from the hmi.M 720s series of JSOC are used as ground-truth labels.