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Measuring the Vector Magnetic Field of AR 11158 with HMI
by the VectorFieldTeam
- 1 Intro – Vector magnetic fields (Todd et al.)
- 1.1 HMI Vector Field Overview
- 1.2 AR 11158 – X-class Flare
2 Instrument and Data Processing (Sebastien & Jesper)
- 2.1 HMI instrument
- 2.2 Framelist for vector field
- 2.3 Relevant calibration of HMI instrument
- 2.4 Specifics of vector data camera, filtergrams
- 2.5 Processing of filtergrams – dark, flat, cosmic rays, gap filling, distortion
- 2.6 Pipeline and special HMI processing
- 3 IQUV calculation (Sebastien)
- 3.1 Computation of IQUV
- 3.2 720 calculation – interpolation in time and space, averaging
- 3.3 Other 720s quantities (very briefly)
- 4 VFISV inversion (Rebecca)
- 4.1 ME method and VFISV summary
- 4.2 Specifics of implemented VFISV for this data series
- 4.2.1 Weighting
- 4.2.2 The Hack
- 4.2.3 Convergence Criteria, multiple minima
- 4.3 Formal Error estimation
5 Disambiguation (Graham & KD)
- 5.1 General method, issues, and uncertainties; planar and spherical
- 5.2 HMI specifics, thresholds, mapping, annealing
- 5.3 Bitmap and confidence index
- 6 HMI.B Data series and access (Todd)
- 6.1 Organization of data series
- 6.2 Details of HMI.B contents (Rebecca)
- 6.3 Description of HARPs
- 6.4 Export – general
7 Projections (Xudong & Yang)
- 7.1 Native format – CCD coordinates etc.
- 7.2 Coordinate Transformation and Vector Components on Export
- 7.2.1 Mapping of pixels to regular coordinate system
- 7.2.2 Vector field components/directions
- 7.2.3 Handling of computed error quantities
- 8 Known and unresolved issues with HMI data and processing (Yang, et al.)
- 8.1 Periodic Errors
- 8.2 Residual Cross-talk
- 8.3 Disambiguation issues
- 8.4 Other systematic and instrumental issues that affect data
- 9 Discussion of HMI measurements of AR 11158 - Validation (KD et al.)
- 9.1 General comments on determination of vector magnetic field
- 9.2 Time Evolution of AR 11158 – features both real and otherwise
- 9.3 Validation and limitations of HMI processing and data
- 9.4 Qualitative comparison with B_LoS, Hinode, and other field measures
- 10 Summary (Todd et al.)
- 10.1 Remaining work for pipeline modules
- 10.2 Uses of data – NLFFF, DAVE4VM, other
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