D-1 : M3-Magnetic Field Data Products

1
D-1 M3-Magnetic Field Data Products

• Data Product Development Session
• Chairs R. Larsen/Y. Liu
• Status draft

2
HMI Science (Magnetic Field)

• Sources and drivers of solar activity and
  disturbances
• Evolution of small-scale magnetic elements
  (coronal heating)
• Emergence of magnetic flux and solar transient
  events
• Magnetic configuration and mechanisms of solar
  flares and CMEs.
• Links between the internal processes and dynamics
  of the corona and heliosphere
• Complexity and energetics of solar corona
• Large-scale coronal field
• Coronal magnetic structure and solar wind.
• Precursors of solar disturbances for
  space-weather forecast.
• Determination of magnetic cloud Bs events.

3
HMI Magnetic Field Data Products

LEV.0.5
1. minimum energy method (Metcalf, 1994).
2. structure minimization method (Georgoulis
et al, 2004).

LEV.1.0

1. Optimization approach (Wheatland et al, 2000)
2. etc.

1. ILCT (Welsch et al, 2004)
2. The minimum energy fit (Longcope, 2004)
3. 3. induction equation (Kusano et al, 2002).

Coronal magnetic fields. (NLFFF, MHD)


LEV.1.5
Plasma flow.
Synoptic maps.
PFSS HCCSSS models
Coronal/Heliospheric fields.
Connectivity separatrix
Energy flux through the photosphere.
Helicity flux through the photosphere.
MHD simulation
Dynamics of coronal/helio. structure.
Topology structure
Emerging flux effect
Surface flow effect
Solar transients
Prediction of IMF solar wind speed.
Empirical estimate MHD simulation.
MHD simulation
4
HMI Magnetic Field Data Products
HAO calibration group by Tomczyk et al
180 ambiguity solution group by Metcalf et al.
Coronal field reconstruction group by Schrijver
et al.
Working group to be formed by Hoeksema et al
Working group to be formed by Welsch et al ???
Coronal magnetic fields. (NLFFF, MHD)
Plasma flow.
Synoptic maps.
Need a working group?
Coronal/Heliospheric fields.
Connectivity separatrix
Energy flux through the photosphere.
Helicity flux through the photosphere.
Need a working group? If yes, who will organize
one? Longcope???

• Two working groups
• PFSS-like models group by Hoeksema ?
• MHD simulation groups
• Local scale by Abbett Wu???
• Global scale by Linker et al???

Dynamics of coronal/helio. structure.
Prediction of IMF solar wind speed.
5
D-2 HMI data products

• What data products must we produce?
• Vector magnetic field on the photosphere (180
  degree ambiguity resolved)
• Synoptic map of vector magnetic field (need a
  working group, play with SOLIS data)
• Coronal magnetic field (reconstructed from NLFFF
  model or MHD simulation)
• Coronal/heliospheric fields (stable and dynamic)
  from PFSS-like models and MHD simulation (need
  working groups on PFSS and MHD)
• Space weather-related products solar wind speed,
  IMF, orientation of MC from PFSS-like models and
  MHD simulation (working groups for PFSS-like
  approach and HMI simulation approach)
• Topology of magnetic field (plus) (need working
  group)
• Plasma flow on the photosphere (plus) (need
  working group)
• Additional products proposed during meeting.

6
D-2 HMI data products (Cont.)

• Assessment of required resources, etc (The
  proposed codes need to be examined against the
  following issues)
• Pipeline software
• Analysis software/studies
• Supporting software/models
• Computational requirements (run time estimates,
  system requirements, )
• Storage requirements size, duration, etc.
• Access web, archive, logs, search methods, etc.

7
D-3 Implementation

• What codes do we have now and what codes need to
  be developed?
• inversion algorithm MDI-like
  algorithm.
• Define key milestones, test procedures, and
  target dates.

8
D-3 Implementation

• What codes do we have now and what codes need to
  be developed?
• 180 degree ambiguity solution algorithm and
  code already exist, but processing speed needs to
  be improved.
• Define key milestones, test procedures, and
  target dates.
• SOLIS data will be test data (evaluate the
  accuracy and efficiency).
• Work group already formed!

9
D-3 Implementation

• What codes do we have now and what codes need to
  be developed?
• synoptic map of vector magnetic field LOS
  component map is easy, but need to face challenge
  on transverse component map.
• Define key milestones, test procedures, and
  target dates.
• SOLIS data will be test data.
• Need to form a working group!

10
D-3 Implementation

• What codes do we have now and what codes need to
  be developed?
• coronal magnetic field NLFFF/MHD simulation
  challenge too slow.
• Define key milestones, test procedures, and
  target dates.
• A working group has formed.

11
D-3 Implementation

• What codes do we have now and what codes need to
  be developed?
• coronal/heliospheric fields (stable and
  dynamic) PFSS-like/MHD simulation challenge
  modeling transients.
• Define key milestones, test procedures, and
  target dates.
• Need one or two groups.

12
D-3 Implementation

• What codes do we have now and what codes need to
  be developed?
• space weather related products (solar wind
  speed, IMF, orientation of magnetic clouds)
  PFSS-like/MHD simulation.
• Define key milestones, test procedures, and
  target dates.
• Need working groups?

13
D-3 Implementation

• What codes do we have now and what codes need to
  be developed?
• velocity field on the photosphere need to
  evaluate algorithms.
• Define key milestones, test procedures, and
  target dates.
• Need working groups?