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Based on the vector magnetic field data observed by Helioseismic and Magnetic Imager(HMI) on the Solar Dynamics Observatory (SDO), we have built a 3D solar active region magnetic field dataset using the Nonlinear Force-Free Coronal Magnetic Field (NLFFF)Extrapolations.

The current total is over 200 TB, 73,000 3D magnetograms spanning the years 2010 to 2019, with a temporal resolution of 96 minutes and a spatial resolution consistent with the original sharp cea magnetograms.