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HMI Science Objectives

HMI Science Objectives. Convection-zone dynamics and the solar dynamo Structure and dynamics of the tachocline Variations in differential rotation Evolution of meridional circulation Dynamics in the near surface shear layer

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HMI Science Objectives

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  1. HMI Science Objectives • Convection-zone dynamics and the solar dynamo • Structure and dynamics of the tachocline • Variations in differential rotation • Evolution of meridional circulation • Dynamics in the near surface shear layer • Origin and evolution of sunspots, active regions and complexes of activity • Formation and deep structure of magnetic complexes of activity • Active region source and evolution • Magnetic flux concentration in sunspots • Sources and mechanisms of solar irradiance variations • Sources and drivers of solar activity and disturbances • Origin and dynamics of magnetic sheared structures and d-type sunspots • Magnetic configuration and mechanisms of solar flares • Emergence of magnetic flux and solar transient events • Evolution of small-scale structures and magnetic carpet • Links between the internal processes and dynamics of the corona and heliosphere • Complexity and energetics of the solar corona • Large-scale coronal field estimates • Coronal magnetic structure and solar wind • Precursors of solar disturbances for space-weather forecasts • Far-side imaging and activity index • Predicting emergence of active regions by helioseismic imaging • Determination of magnetic cloud Bs events

  2. Internal rotation Ω(r,Θ) (0<r<R) Processing Data Product Internal sound speed, cs(r,Θ) (0<r<R) HMI Data Spherical Harmonic Time series To l=1000 Heliographic Doppler velocity maps Filtergrams Mode frequencies And splitting Full-disk velocity, v(r,Θ,Φ), And sound speed, cs(r,Θ,Φ), Maps (0-30Mm) Carrington synoptic v and cs maps (0-30Mm) Local wave frequency shifts Ring diagrams Doppler Velocity High-resolution v and cs maps (0-30Mm) Time-distance Cross-covariance function Tracked Tiles Of Dopplergrams Wave travel times Deep-focus v and cs maps (0-200Mm) Egression and Ingression maps Wave phase shift maps Far-side activity index Stokes I,V Line-of-sight Magnetograms Line-of-Sight Magnetic Field Maps Stokes I,Q,U,V Full-disk 10-min Averaged maps Vector Magnetograms Fast algorithm Vector Magnetic Field Maps Coronal magnetic Field Extrapolations Vector Magnetograms Inversion algorithm Tracked Tiles Tracked full-disk 1-hour averaged Continuum maps Coronal and Solar wind models Continuum Brightness Solar limb parameters Brightness feature maps Brightness Images HMI Data Analysis Pipeline HMI - SOC Pipeline Level-0 Level-1

  3. Issues • Who are the users of these data products? • In what form are the products required? • How do we indicate/quantify uncertainty? – different inversion methods, trade-offs, models • Do we need to indicate resolution? • What about intermediate products (e.g. travel times)? • Do we supply interactive tools? • Are there any issues about changing products during lifetime of mission?

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