SOHO CoRoT Kepler Picard SDO GONG

Initial Magnetic Field Observations from HMI


Hoeksema J. Todd


Stanford University


First results from new space missions
Auteur(s) supplémentaire(s)The HMI Magnetic Field Team


The Helioseismic and Magnetic Imager (HMI) on the Solar Dynamics Observatory (SDO) has begun to produce a synoptic series of full-disk arc-second-resolution magnetograms. Filtergrams to produce line-of-sight magnetograms and photograms are collected every 45 seconds and the vector field will be routinely calculated every 12 minutes in automatically identified active region patches. Select quick-look products will become available within minutes and more complete definitive science data will be published within a day or two. The team and colleagues have developed modules to routinely produce a comprehensive set of higher level products, including synoptic maps and frames, local surface-flow maps, a variety of local and global coronal field models, and time series of tracked active-region parameters all useful in learning to forecast space weather events. Comparisons with MDI, SOLIS, AIA, EVE, and other ground-based observations will ultimately help understand uncertainties in the observations. This work was supported by NASA through contract NAS5-02139 to Stanford University.
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