Abstract | 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. |
