Notes on HMI Observables

Instrument Papers
Couvidat et al. 2011, Wavelength Dependence of the Helioseismic and Magnetic Imager (HMI) Instrument onboard the Solar Dynamics Observatory (SDO), Solar Physics (link to Sol. Phys). Calibration and characterisation of the filter system.

Wachter et al. 2011, Image Quality of the Helioseismic and Magnetic Imager (HMI) Onboard the Solar Dynamics Observatory (SDO), Solar Physics (link to Sol. Phys). Distortion, MTF, stray light, flat field etc.

Schou et al. 2010, Polarization Calibration of the Helioseismic and Magnetic Imager (HMI) onboard the Solar Dynamics Observatory (SDO), Solar Physics (link to Sol. Phys). Describes polarimetric design of the instrument.

Pipeline papers
Larsen & Schou, 2011, HMI global helioseismology data analysis pipeline, (link to JPCS). Discusses improvements to the pipeline (from MDI era) and describes output and intermediate results.

Zhao et al. 2011, Time-Distance Helioseismology Data-Analysis Pipeline for Helioseismic and Magnetic Imager Onboard Solar Dynamics Observatory (SDO/HMI) and Its Initial Results, (link to Sol. Phys). Describes the basic time-distance pipeline, although details have not as yet been finalised (22.09.2011).

Bogart et al. 2011, HMI ring diagram analysis I. The processing pipeline, JPCS, (link to pdf).

Bogart et al. 2011, HMI ring diagram analysis II. Data products, JPCS, (link to pdf)

Centeno et al. 2010, HMI: first results, (link to arXiv). Mostly discussing the inversion technique for the Stokes profile to generate the vector magnetograms.

Borrero et al. 2010, VFISV: Very Fast Inversion of the Stokes Vector for the Helioseismic and Magnetic Imager, (link to Sol. Phys). Describes the inversion code generating the vector magnetograms.

Other papers
Martinez Oliveros et al. 2011, Transient Artifacts in SDO/HMI Flare Observations,(link to ADS). Increases in the photospheric continuum intensity at the time of a flare are artifactual.

Fleck et al. 2011, On the Formation Height of the SDO/HMI Fe 6173 A Doppler Signal, (link to Sol. Phys). Filter transmission profile comparison between MDI and HMI and formation heights.

Ulrich & Beck, 2011, Bayesian Automatic Classification Of HMI Images, AAS (link to ADS). Instrumental artifacts.

Muglach & Schuck et al. 2011, The Photospheric Velocity Field of Active Regions Derived from SDO/HMI Vector Magnetograms, AAS (link to ADS). Velocity retrieved from vector magnetograms.

Rabello-Soares et al. 2011, A Comparison Of Solar High-degree p-mode Parameters From HMI And MDI, AAS (link to ADS).

Howe et al. 2010, Comparison of HMI Dopplergrams with GONG and MDI data, JPCS (link to pdf)

JPCS vol 271: GONG-SoHO 24: A new era of seismology of the sun and solar-like stars, 27 June-2 July 2010, Aix-en-Provence, France. A lot of proceedings related to HMI-SDO results.

Poster
Ring diagram pipeline - status report, R. Bogart, SDO3 Oct 31 - Nov 4 2011

Websites
Ring diagram pipeline JSOC website
Spatial variations in fit parameters for RD

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