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Early Magnetic Field Observations From HMI

Early Magnetic Field Observations From HMI

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Early Magnetic Field Observations From HMI

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  1. Early MagneticFieldObservations From HMI J. Todd Hoeksema and the HMI Magnetic Field Team: Yang Liu, Keiji Hayashi, Xudong Sun, Jesper Schou, Sebastien Couvidat, Xuepu Zhao, Rick Bogart, Priya Desai Steve Tomczyk, Juan Borrero, Rebecca Centeno Elliot K.D. Leka, Graham Barnes, Ashley Crouch M Turmon, P Schuck, T. Wiegelmann The rest of the HMI Team Stanford, HAO, CORA, JPL, GSFC, MPS HMI 2010.05.20_19:19:30 Early HMI MagneticField Observations

  2. Abstract HMI, the Helioseismic and Magnetic Imager on SDO is producing a synoptic series of full-disk arc-second magnetograms. Longitudinal field is determined every 45s and vector inversions computed every 12 minutes in patches. Higher level products will be produced including tracked AR patches, synchronic frames, NLFFF and MHD coronal field models, and photospheric flow maps Some quick-look products are available in minutes for space weather purposes. Early HMI MagneticField Observations

  3. Line-of-sight magnetic field is computed from Doppler velocity in two polarizations, as for MDI. Vector Field is computed from Stokes parameters derived from an independent set of polarized filtergrams. The possibility of combining the two cameras is being explored to improve sensitivity. The nominal line-of-sight cadence is 45 seconds. The basic vector field cadence is 90s or 135 seconds. HMI MagneticField Observables Early HMI MagneticField Observations

  4. Vector field data products are the following quantities, uncertainties on each, and some covariances: |B| - total flux Filling factor (where possible) Inclination (gamma) to the line of sight Azimuth (phi) CCW relative to ‘up’ on the CCD camera Magnetic line-of sight velocity Data will be exported in a variety of coordinate systems: [Bx,By,Bz], [B_total,gamma,phi], and [Br,Btheta,Bphi] HMI MagneticField Observables Early HMI MagneticField Observations

  5. Magnetic Processing Scheduling There are four schedules for Magnetic Field data processing • Quick Look/Near Real Time • Routine processing of some data available within minutes of observation • Standard • Routinely completed for all data on regular cadence (e.g. Vector B) after about 25 hours. • On Demand • Completed for small fraction of data when interesting things happen or whenever requested by a qualified user (HiRes MHD time series for a big flare & CME campaign • On Request • Products, such as high-resolution time series of MHD model solutions, will be generated as resources allow. Completed when system resources allow Early HMI MagneticField Observations

  6. Definitive Science Observables – HMI Magnetic Field Images Standard Pipeline Observables 45-second Magnetic line-of-sight field on full disk Continuum intensity and line depth on full disk Doppler velocity on full disk 12-minute Inverted vector B on full disk Disambiguated B on selected patches IQUV 12-hour Disambiguated vector field on full disk On Demand 180-second spatially binned disambiguated vector field in patches 360-second disambiguated patches 12-minute full disk disambiguated vector field On Request 90-second disambiguated patches 90-second or other cadence IQUV Anything else Early HMI MagneticField Observations

  7. HMI 720s Magnetogram Early HMI MagneticField Observations

  8. Early HMI MagneticField Observations

  9. x Magnetic Field Blos Zero Level 45s 720s Early HMI MagneticField Observations

  10. Magnetic Field Blos Mean FieldHMI – MDI – WSO Early HMI MagneticField Observations

  11. HMI Blos 45 vs HMI Blos Vector HMI Blos 45 vs HMI Blos 720 Early HMI MagneticField Observations

  12. HMI Blos Vector Method HMI Blos 45 vs HMI Blos 720 Early HMI MagneticField Observations

  13. HMI vs MDI Blos Comparison Early HMI MagneticField Observations

  14. HMI vs MDI Blos Comparison Early HMI MagneticField Observations

  15. MDI vs MtWSO MDI vs Solis HMI vs MDI HMI = 1.03 SOLIS Early HMI MagneticField Observations

  16. AR 11066 Early HMI MagneticField Observations

  17. AR 11069 Early HMI MagneticField Observations

  18. HMI Vector Inversion and MDI FD LoS ComparisonR. Centeno Eliot, J. Borrero, S. Tomczyk, K. Hayashi, Y. Liu Early HMI MagneticField Observations

  19. Frame of Vector Field Movie from Mar 29 SunspotK. Hayashi, R. Centeno Eliot, et al. Early HMI MagneticField Observations

  20. Frame of Vector Field Movie from May 22 SunspotK. Hayashi, R. Centeno Eliot, et al. Early HMI MagneticField Observations

  21. Additional Magnetic Field Model Products Produced as Standard ,On-demand, or On-request Synoptic synchronic maps and frames Automated Identification and Tracking of AR Patches and other features – 12 minutes PFSS Model – Various resolutions and Cadences Open Field Foot Point Maps NLFFF Model – AR patches, daily and on request MHD Models Daily low-resolution Monthly and major events in hi-res Surface Flow Maps ILCT, FLCT DAVE4VM Early HMI MagneticField Observations

  22. CR2096 HMI LoS Synoptic Map – Y. Liu & X. Zhao Early HMI MagneticField Observations

  23. CR2096 HMI Synoptic Map Closeup – Y. Liu & X. Zhao Early HMI MagneticField Observations

  24. MDI Feb 9, 2002 AR Patch IDMike Turmon & Xudong Sun HMI March 29, 2010 Early HMI MagneticField Observations

  25. DAVE4VM Result Showing Horizontal Velocity Pete Schuck, Karin Muglach, Xudong Sun Black - vertical magnetic field, Red - horizontal magnetic field, Blue, Horizontal plasma velocities. Early HMI MagneticField Observations

  26. Preliminary HMI ResultsNLFFF Model Result, 2010.04.08T. Wiegelmann & X. Sun Disambiguated Vector Field March 29, 2010 K.D. Leka, G. Barnes, X. Sun Disambiguated Bx Early HMI MagneticField Observations

  27. Early HMI MagneticField Observations

  28. HMI Space Weather and Quick-Look Browsing Products II Synoptic Maps Synchronic Frame - radial field estimate - 96-minute, reduced resolution Evolved Carrington/Synchronic map - 6 hour Far side active region map - daily Movie of global sun activity - 54-day, updated daily Full-disk Velocity – averaged snapshot every 12 minutes Full-disk Intensity - 12 minute average Full-disk Line Depth - 12 minute average Full-disk and ARP Overlays of AIA and HMI Blos - 90-sec update, movie 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. Early HMI MagneticField Observations

  29. HMI Space Weather and Quick-Look Browsing Products HMI space weather and browse products can be computed in near real time from quick look 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 Proposed Space Weather Product LIST – Comments welcome! This list is preliminary and is not a commitment. Each product must have a prospective user. Full Disk Line-of-sight magnetograms (Blos) - 90-sec; 1K*1K resolution Vector magnetogram, inverted & disambiguated - 12 hour Movie of Blos - 12-day history, frames updated each 90 seconds Active Region Patches (ARPs) Identification of active region patches - 12 minute (hourly?) Vector magnetic field in major ARPs, disambiguated - 12 minute Time series of major ARP indices (since appearance, updated every 12 min 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 Early HMI MagneticField Observations

  30. Magnetic Field Modules Time Average_IQUV Stokes Inversion Field Disambiguation Bx By Bz Coordinate Transform Br Bth Bph Transform Btot Inc Az Transform VectorB_Remap/Interpolate VectorB Spatial Average VectorB Temporal Average Carrington Synoptic Chart Synchronic Map & Frame Polar Field Extrapolation PFSS Model & Magnetic Harmonic Coefficients Inferred Horizontal Flows Non Linear Force Free Field MHD Model Active Regions MHD Model Global Corona Solar Wind Model Model Heliospheric Conditions Space Weather Products HMI_Mean Field Associated HMI Pipeline Modules AR Patch ID & Tracking Feature Recognition Spatial Averaging Early HMI MagneticField Observations