HMI Data Products Magnetic Field Part Yang Liu

HMI Data Products (Magnetic Field Part) Yang Liu and HMI Team Stanford University and Other Places yliu@sun. stanford. edu Page

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

Magnetic Processing Scheduling There are four Schedules for Magnetic Field data processing • Quick Look – Routine processing on data available within minutes of observation • Standard – Routinely completed for all definitive 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. • On Request – Products, such as high-resolution time series of MHD model solutions, will be generated as resources allow. Completed when system resources allow 8/30/2021 SDO SUMMER SCHOOL, 2010 3

Definitive Standard Science Data Products – HMI Magnetic Field Images • Pipeline – 45 -second • Magnetic line-of-sight velocity on full disk • Continuum intensity on full disk • Vlos on full disk – 12 -minute • Inverted vector B on full disk • Disambiguated B on selected patches – 12 -hour • Disambiguated vector field on full disk • On Demand – 3 -second level 1. 5 filtergrams (limited number) – 3 -minute (180 -second) spatially binned disambiguated vector field patches – 6 -minute (360 -second) disambiguated patches – 12 -minute full-disk disambiguated vector field • On Request – 90 -second disambiguated patches – 90 -second IQUV – Anything else 8/30/2021 SDO SUMMER SCHOOL, 2010 5

Additional Magnetic Field Model Products – Produced as Standard – On-demand, and – On-request products • Automated Identification of AR Patches and other features • Synoptic & Synchronic Maps & Frames • PFSS Model – Various resolutions • NLFFF Model – AR patches, daily • MHD Models – Daily low-resolution – Monthly and major events in hi-res • Open Field Foot Point Maps • Surface Flow Maps – ILCT, FLCT DAVE 4 VM 6

HMI Space Weather and Quick-Look Browsing Products • Generally HMI space weather and quick-look browsing products are 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 • DRAFT LIST – Comments welcome! This list is preliminary and is not a commitment. Each product must have a prospective user. • Magnetic Products Full Disk – Line-of-sight magnetograms (Blos) - 90 -sec; 1 K*1 K 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 (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 7

HMI Space Weather and Quick-Look Browsing Products - continued – Synoptic Maps • Synchronic Frame - radial field estimate - 96 -minute, reduced resolution • Evolved Carrington/Synchronic map - 6 hour – Far Side Products • Far side active region map - daily • Movie of global sun activity - 54 -day, updated daily • Other Products – 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) 8

Line-of-sight Field Products Page 10

Vector Field Products Page 11

Vector Magnetic Field For AR 1057 And Disambiguation (R. Centeno Eliot, J. Borrero, S. Tomczyk, K. D. Leka, G. Barnes, A. Crunch, T. Hoeksema, K. Hayashi, X. Sun) Line-of-sight field Transverse field Azimuth Page 12

Vector Magnetic Field from Mar 29 Sunspot (K. Hayashi, R. Centeno Eliot, et al. ) Page 13

Vector Magnetic Field Courtesy HMI Team and K. Hayashi Page 14

Product—Non-linear Force Field Model NLFFF Model Result (courtesy: T. Wiegelmann & X. Sun) Page 15

Product—Velocity Field Black - vertical magnetic field, Red horizontal magnetic field, Blue, Horizontal plasma velocities. DAVE 4 VM Result Showing Horizontal Velocity Pete Schuck, Karin Muglach, Xudong Sun Page 16

Product—Synoptic Map 1. Synoptic map of the line-of-sight magnetic field for CR 2096. 2. About 50, 000 line-of-sight magnetograms are used to produce this map. 3. Map size is 3600 x 1440; 4. Y-axis is in Sin(latitude). Page 17

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Product-Solar Wind Speed and IMF (Xudong Sun) Courtesy Xudong Sun Page 19

Product-MHD Solution (K. Hayashi) Courtesy K. Hayashi Page 20

Data Processing Status • Lev 0 processing is working well – Telemetry to images • Lev 1 processing is working but needs refinement – Flat field, limb finding, bad pixel detection, energetic particle detection • Some shortcomings being worked on. • Observables are being generated to hmi_test series – V, M, Ic, Ld, Lw, IQUV – Available to all – Processing is inconsistent as improvements are added without reprocessing • Higher level products being worked on – Includes vector field inversions and local/global helioseismology • http: //jsoc. stanford. edu Page 21