Early HMI Magnetic Field Observations Early Magnetic Field Observations 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 HMI _19:19:30 Stanford, HAO, CORA, JPL, GSFC, MPS

Early HMI Magnetic Field Observations 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. Abstract

Early HMI Magnetic Field Observations HMI Magnetic Field Observables 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.

Early HMI Magnetic Field Observations HMI Magnetic Field Observables 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]

Early HMI Magnetic Field Observations 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 Magnetic Field Observations 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 Magnetic Field Observations HMI 720s Magnetogram

Early HMI Magnetic Field Observations

Magnetic Field Blos Zero Level x 45s720s

Early HMI Magnetic Field Observations Magnetic Field Blos Mean Field HMI – MDI – WSO

Early HMI Magnetic Field Observations HMI Blos 45 vs HMI Blos Vector HMI Blos 45 vs HMI Blos 720

Early HMI Magnetic Field Observations HMI Blos Vector Method HMI Blos 45 vs HMI Blos 720

Early HMI Magnetic Field Observations HMI vs MDI Blos Comparison

Early HMI Magnetic Field Observations HMI vs MDI Blos Comparison

Early HMI Magnetic Field Observations MDI vs Solis MDI vs MtWSO HMI vs MDI HMI = 1.03 SOLIS

Early HMI Magnetic Field Observations AR 11066

Early HMI Magnetic Field Observations AR 11069

Early HMI Magnetic Field Observations HMI Vector Inversion and MDI FD LoS Comparison R. Centeno Eliot, J. Borrero, S. Tomczyk, K. Hayashi, Y. Liu

Early HMI Magnetic Field Observations Frame of Vector Field Movie from Mar 29 Sunspot K. Hayashi, R. Centeno Eliot, et al.

Early HMI Magnetic Field Observations Frame of Vector Field Movie from May 22 Sunspot K. Hayashi, R. Centeno Eliot, et al.

Early HMI Magnetic Field Observations 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 Magnetic Field Observations CR2096 HMI LoS Synoptic Map – Y. Liu & X. Zhao

Early HMI Magnetic Field Observations CR2096 HMI Synoptic Map Closeup – Y. Liu & X. Zhao

Early HMI Magnetic Field Observations AR Patch ID Mike Turmon & Xudong Sun HMI March 29, 2010 MDI Feb 9, 2002

Early HMI Magnetic Field Observations 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 Magnetic Field Observations Preliminary HMI Results NLFFF Model Result, T. Wiegelmann & X. Sun Disambiguated Vector Field March 29, 2010 K.D. Leka, G. Barnes, X. Sun Disambiguated Bx

Early HMI Magnetic Field Observations

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 Magnetic Field Observations 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 Magnetic Field Observations 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