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Size: 2186
Comment:
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Size: 2286
Comment: Confirming azimuth fiducial
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| This HMI vector field pipeline module performs an inversion on an input DRMS data set containing I,Q,U,and V to determine the vector magnetic field parameters. The outputs are Total Magnetic Flux, Filling Factor, Inclination of the field to the line of sight, Azimuth (not disambiguated, so 0 - 180 degrees) relative to the top of the CCD camera, and uncertainties on each quantity. | This HMI vector field pipeline module performs an inversion on an input DRMS data set containing I,Q,U,and V to determine the vector magnetic field parameters. The outputs are Total Magnetic Field Strength, Filling Factor, Inclination of the field to the line of sight, Azimuth (not disambiguated, so 0 - 180 degrees) relative to the top of the CCD camera, and uncertainties on each quantity. |
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| . B Total - total magnetic flux in pixel | . B Total - total magnetic field strength in pixel |
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| . Inclination - angle the vector field makes to the line of sight to the pixel . Azimuth - angle the tangential field makes to nominal instrument "north" |
. Inclination - angle in degrees the vector field makes to the line of sight to the pixel; 0 degrees toward observer . Azimuth - angle in degrees the tangential field makes to nominal instrument "north" (TBR) counter clock-wise |
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| . 95% complete. . Earlier version of module ran on HMI test data sets, currently not functioning |
. 98% complete; addressing DRMS interface issues |
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| . 90% complete . Recent version of code was able to run successfully |
. 99% complete . Current version of code runs successfully; still deciding on output details |
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| . 95% - earlier version functioned nominally | . 98% - earlier version functioned nominally, working on DRMS interface issues |
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HMI Pipeline Module - Stokes Inversion
This HMI vector field pipeline module performs an inversion on an input DRMS data set containing I,Q,U,and V to determine the vector magnetic field parameters. The outputs are Total Magnetic Field Strength, Filling Factor, Inclination of the field to the line of sight, Azimuth (not disambiguated, so 0 - 180 degrees) relative to the top of the CCD camera, and uncertainties on each quantity.
Module Inputs
- DRMS data set containing averaged I,Q,U,and V derived from HMI level 1.0 corrected filtergrams
Module Outputs
- Vector magnetic field quantities
- B Total - total magnetic field strength in pixel
- Filling Factor - fraction of pixel with magnetic field
- Inclination - angle in degrees the vector field makes to the line of sight to the pixel; 0 degrees toward observer
- Azimuth - angle in degrees the tangential field makes to nominal instrument "north" (TBR) counter clock-wise
- Uncertainties - quantitative estimates of uncertainties of the above quantities
Cadence
- Module will nominally run every 12 minutes on Active Region Patches and less frequently on the entire Sun.
Can be run on longer or shorter cadence in on demand mode, could be run with as little 90 seconds of HMI filtergrams.
Archive
- These products are archived
Overall Status of Module
- 98% complete; addressing DRMS interface issues
Status of Code
- 99% complete
- Current version of code runs successfully; still deciding on output details
- Code will require adjustment during commissioning as experience is gained with HMI instrument characteristics.
- Algorithms continue to be adjusted for speed and performance.
Status of DRMS module
- 98% - earlier version functioned nominally, working on DRMS interface issues
Issues needing resolution
- How to handle weak field regions
- How to indicate lack of convergence of fit
Responsible scientist
- Yang Liu, Rebecca Centeno Elliott, Steve Tomczyk, Rick Bogart, Juan Borreros
Remarks
- Algorithm described in paper: TBD
- Back to ["HMIModuleTable"]
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