Transcript HMI Magnetic Products & Pipeline

HMI Magnetic Products &
Pipeline
http://jsoc.stanford.edu/jsocwiki/Lev1Doc
HMI Magnetic Field Products
• 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 nominal line-of-sight cadence is 45 seconds. The
basic vector field cadence in 90 seconds.
• Vector field data products will be the following quantities
and uncertainties on each
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|B| - total flux
Filling factor (where possible)
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_total,gamma,phi], and [Br,Btheta,Bphi]
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, 2007
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Magnetic Processing Scheduling
There are four Schedules for Magnetic Field data processing
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Quick Look
– Routine processing on data available within minutes of observation
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Standard
– Routinely completed for all data on regular cadence (e.g. Vector B)
after about 25 hours.
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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
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On Request
– Products, such as high-resolution time series of MDH model
solutions, will be generated as resources allow. Completed when
system resources allow
Definitive Standard Science Data Products – HMI Magnetic Field Images
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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
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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
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On Request
– 90-second disambiguated patches
– 90-second IQUV
– Anything else
Additional Magnetic Field Model Products
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Produced as Standard
On-demand, and
On-request products
• Automated Identification of AR Patches and other
features
• 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 DAVE4VM
HMI Space Weather and Quick-Look Browsing Products
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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.
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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
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DRAFT LIST – Comments welcome! This list is preliminary and is not a commitment. Each product
must have a prospective user.
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Magnetic Products
Full 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 (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
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
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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)
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Note: Not all products are produced by HMI.
Vector Magnetic Field Modules
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Time Average_IQUV
Stokes Inversion
Field Disambiguation
Merging Patches
Bx By BzTransform
Br Bt BpTransform
Btot In Az Transform
VectorB_Remap
VectorB Spatial Average
VectorB Temporal Average
Carrington Synoptic Chart
Synchronic Frame
Daily Synchronic Update
Vector Synchronic Map
Polar Field Extrapolation
Magnetic Harmonic Coefficients
Potential Field-Source Surface
Potential Field-Local
Non Linear Force Free Field
Inferred Horizontal Flow - Local
Inferred Horizontal Flow - Global
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Solar Wind Model
Model Dynamic Active Regions
Model Dynamic Corona
Model Heliospheric Conditions
Model 3D AR Field
Space Weather Products - Local
Space Weather Products - Global
Associated HMI Pipeline Modules
• Feature Recognition
• Spatial Average
Line of Sight Magnetic Field Modules
• B_LOS - Stokes
• B_LOS - Average
• B_LOS - Remap
• B_LOS - Remap_and_Average
• B_LOS – Carrington Map
• B_LOS – Synchronic Frame
• B_LOS – Daily Synchronic Map
• B_LOS - MDI_Emulation
• HMI_Mean Field