Science Data Products – HMI Magnetic Field Images

Pipeline45-second

Magnetic line-of-sight velocity on full diskContinuum intensity on full disk Vlos on full disk

12-minuteInverted vector B on full diskDisambiguated B on selected patches

3-hourDisambiguated vector field on full disk

On Demand• 3-second level 1.5 filtergrams (limited number)• 3-minute (180-second) spatially binned disambiguated vector field in 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

Coronal andSolar wind Properties

Surface Plasma Flows

HMI Science Analysis Plan – Magnetic Topics

9-3A Magnetic Shear

1-1A Tachocline

3-1B Differential Rotation

2-1C Meridional Circulation

4-1D Near-Surface Shear Layer

6-2B Active Regions

7-2C Sunspots

12-3D Magnetic Carpet+Heating

10-3B Flare/CME Mag. Config

11-3C Flux Emergence

13-4A Coronal Energetics AIA]1

14-4B Large-scale B, Ph+Cor

15-4C Solar Wind + Evol, Struct

16-5A Far-side Activity Evolution

17-5B Predicting A-R Emergence

18-5C IMF Bs Events

Filtergrams

Line-of-sightMagnetograms

Vector Magnetograms

Line-of-SightMagnetic Field Maps

Coronal Magnetic FieldExtrapolations (non MHD)

Vector MagneticField Maps

Magnetic Data Products

MagneticObservables

HMI Data

5-2A Activity Complexes, Cycle

8-2D Irradiance Variations

19 Topology Structure over AR

THoeksema

YLiu

EBenevolenskaya, TBai

THoeksema

TBai

RBush

JBeck, YLiu,

XPZhao, KHayashi

YLiu, Schrijver

AKosovichev

AKosovichev

AKosovichev

JBeck

LM, KHayashi

YLiu

KHayashi, LM

YLiu, LM

Schrijver, YLiu

XPZhao

TBai

PScherrer

KHayashi

KHayashi

Lundstedt

THoeksema, JSchou, HAO

YLiu, JSchou,*HAO, CORA

ContinuumBrightness

RBush, JSchou20 B-Polar, Large/Small Int EBenevolenskay

HINODE Spectropolarimetric Magnetic Field Inverted with HMI-like Algorithm by S. Tomczyk & J. Borrero (HAO)

The three panels show Inclination, Azimuth & Magnetic Field Strength as observed May 7, 20070 180 -180 180 0 3097

The Helioseismic & Magnetic Imager Magnetic PipelineJ. Todd Hoeksema for the HMI Magnetic Team

SPD 2009: 17.01

Magnetic Field Model Products

Produced as StandardOn-demand, andOn-request products

Automated Identification of AR Patches and other featuresPFSS Model – Various resolutionsNLFFF Model – AR patches, dailyMHD Models

– Daily low-resolution– Monthly major events in hi-res

Open Field Foot Point MapsSurface Flow Maps

– ILCT, FLCT DAVE4VM

Magnetic Processing Scheduling

There are four classes of Magnetic Field data processing

Quick LookRoutine processing on data available within minutes of observation

StandardRoutinely completed for all data on

regular cadence (e.g. Vector B)

On DemandCompleted 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 RequestProducts, such as high-resolution

time series of MDH model solutions, will be generated as resources allow. Completed when system resources allow

HMI Vector Field Pipeline & Products

Calibration and Correction of Filtergrams

Magnetic Observables

HMI Data

Increase s/n: Standard HMI resolution Rebinned data (retains temporal resolution) Averaged data (retains spatial resolution)

Vector MagneticField Maps

180 Degree Ambiguity Solver Fast (potential or lfff); Slower but better.

Full disk vector magnetic field:In image coordinatesIn spherical coordinates

Vector magnetic field in active regions:In heliographic coordinatesIn image coordinates

Synoptic maps of vector field(B_r, B_theta, B_phi):

Standard synoptic charts;Synoptic frames;Daily update synoptic maps.

Field Inversion (10m)

Stokes I, Q, U, and V;Vector Magnetograms

(|B|, inclination, azimuth, …)

Filtergrams

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 – This list is preliminary and is not a commitment. Each product must have a prospective user. Comments welcome!

Magnetic ProductsFull Disk

Line-of-sight magnetograms (Blos) - 90-sec; 1K*1K 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 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

Synoptic Maps Synchronic Frame - radial field estimate - 96-minute,

reduced resolution Evolved Carrington/Synchronic map - 6 hour

Far Side ProductsFar side active region map - daily Movie of global sun activity - 54-day, updated daily

Other ProductsFull-disk Velocity - snapshot every 12 minutes Full-disk Intensity - 12 minute Full-disk Line Depth - 12 minute 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.

ABSTRACT

The Helioseismic and Magnetic Imager (HMI) will provide frequent full-disk magnetic field data after launch of the Solar Dynamics Observatory (SDO), currently scheduled NET November, 2009. 16 megapixel line-of-sight magnetograms (Blos) will be recorded every 45 seconds. A full set of polarized filtergrams needed to determine the vector magnetic field requires 90 seconds.

Quick-look data will be available within a few minutes of observation. Quick-look space weather and browse products must have identified users, and the list currently includes full disk magnetograms, feature identification and movies, 12-minute disambiguated vector fields in active region patches, time evolution of AR indices, synoptic synchronic frames, potential and MHD model results, and 1 AU predictions.

A more complete set of definitive science data products will be offered about a day later and come in three types. ‘’Pipeline products,’’ such as full disk vector magnetograms, will be computed for all data on an appropriate cadence. A larger menu of ‘’On Demand’’ products, such as Non-Linear Force Free Field snapshots of an evolving active region, will be produced whenever a user wants them. Less commonly needed ‘’On Request’’ products that require significant project resources, such as a high resolution MHD simulation of the global corona, will be created subject to availability of resources.

Further information can be found at the SDO Joint Science Operations Center web page, jsoc.stanford.edu