HMI Magnetic Field Products jsoc.stanford.edu

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HMI Magnetic Field Productsjsoc.stanford.edu

• Line-of-sight magnetic field will be computed
  from Doppler Velocity in two polarizations, as is
  done for MDI.
• Vector Field will be computed from Stokes
  parameters derived from an independent set of
  polarized filtergrams.
• After launch the possibility of combining the two
  cameras will be explored.
• The basic line-of-sight cadence is 45 seconds.
  The basic vector field cadence in 90 seconds.
• Images are 4k x 4k
• Filtergrams corrected for time, rotation, flat
  field, distortion, cosmic rays

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HMI Magnetic Field Productsjsoc.stanford.edu

• Vector field data products will be the following
  quantities and uncertainties on each
• B - total flux
• Filling factor
• Inclination (gamma) to the line of sight
• Azimuth (phi) relative to solar north
• Magnetic line-of sight velocity
• Data will be exported in a variety of coordinate
  systems Bx,By,Bz, B,gamma,phi (heliographic),
  and Br,Btheta,Bphi
• More detail is provided at VectorMagneticField
  and LineofsightMagneticField and
  SpaceWeatherProducts at jsoc.stanford.edu/jsocwiki
  .

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HMI Magnetic Field Products

• Science Pipeline
• 45 - second
• Blos on full disk
• Vlos on full disk
• Continuum intensity on full disk
• 12 - minute
• Inverted vector B on full disk (TBD)
• Disambiguated B in patches
• 3 - hour
• Disambiguated B on full disk
• On Demand
• 3-second filtergrams
• 3-minute vector B on patches
• 6-minute disambiguated patches
• 12-minute full-disk disambiguated vector field
• On Request
• 90-second disambiguated patches
• 90-second IQUV
• Anything else

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• HMI Space Weather and Quick-Look Browsing
  Products
• Generally HMI space weather and quick-look
  browsing products are those computed in near real
  time from quick look SDO data. They may be used
  for space weather forecasting or real time
  monitoring and display. They should not be used
  for scientific analysis, except perhaps to
  compare the quality of preliminary and definitive
  products.
• HMI space weather and quick-look products will be
  coordinated with the Heliophysics Events
  Knowledge Base.
• These data products will complement the AIA Quick
  Look Browse Products pdf
• This proposed list is very much in preliminary
  form and should not be taken as a commitment.
• Each product should have a prospective user.
• Comments welcome.

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QL HMI Magnetic Products - 1

• Full Disk
• Line-of-sight magnetograms (Blos) - 90-sec 1K1K
  resolution
• Vector magnetogram, inverted disambiguated - 12
  hour
• Movie of Blos - 12-day history, updated each 90
  seconds
• Active Region Patches (ARPs)
• Identification of active region patches - 12
  minute
• Vector magnetic field in major ARPs,
  disambiguated - 12 minute
• Time series of major ARP indices (since
  appearance, updated every 12 minutes or as
  possible)
• Location, orientation, separation, total flux,
  net flux, delta-B, helicity, non-potentiality,
  complexity, field gradient, other
• Alerts based on indices
• Increased time resolution during alerts
• Blos at full spatial resolution in ARPs - updated
  each 90 seconds

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QL HMI Magnetic Products - 2

• Synoptic Maps
• Synchronic Frame - radial field estimate -
  96-minute, reduced spatial resolution
• Evolved Carrington/Synchronic map - 6 hour
• Far Side Product
• Far side active region map - daily
• Movie of global sun activity - 54-day updated
  daily
• Other Products
• Full-disk Velocity - snapshot every 12 minutes
• Full-disk Intensity - 12 minute
• Full-disk Line Depth - 12 minute
• Full-disk and ARP Overlay of AIA and HMI Blos -
  90-sec update, movie

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QL HMI Magnetic Products - 3

• Other Products
• Alerts Indices - 12 minute
• Irradiance, mean field, ARP intensity/flare
  detection
• Movies of ARPs in Intensity (updated hourly)
• Horizontal Flow from LCT in ARPs (daily)
• Coronal Field Models (daily, weekly)
• Global - PFSS, Hybrid - HCCSSS, MHD
• ARPs/Local - PF, NLFFF, MHD
• Field line maps, source surface maps, AIA
  overlays, MHD quantities
• Magnetic field global harmonic coefficients -
  daily
• 1 AU Predictions - WSA velocity, polarity, field
  strength, etc (daily)
• Coronal Holes - open foot points (daily)
• Polar Field Estimate (monthly)
• Note Not all products are produced by HMI.

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HMI Magnetic Field Modules

• Vector Field Modules
• TimeAverage_IQUV
• StokesInversion
• FieldDisambiguation
• MergingPatches
• BxByBzTransform
• BrBtBpTransform
• BrInAzTransform
• VectorB_Remap
• VectorBSpatialAverage
• VectorBTemporalAverage
• CarringtonSynopticChart
• SynchronicFrame
• DailySynchronicUpdate
• VectorSynchronicMap
• PolarFieldExtrapolation
• MagneticHarmonicCoefficients
• PotentialField-SourceSurface
• PotentialField-Local

• InferredHorizontalFlow-Local
• InferredHorizontalFlow-Global
• SolarWindModel
• ModelDynamicActiveRegions
• ModelDynamicCorona
• ModelHeliosphericConditions
• Model3DARField
• SpaceWeatherProducts-Local
• SpaceWeatherProducts-Global
• Associated HMI Pipeline Modules
• FeatureRecognition
• SpatialAverage
• Line of Sight Magnetic Field Modules
• B_LOS-Stokes
• B_LOS-Average
• B_LOS-Remap
• B_LOS-Remap_and_Average
• B_LOS-CarringtonMap
• B_LOS-SynchronicFrame