Large-Scale Spatial Cross-Calibration of Hinode/SOT-SP and SDO/HMI

no code implementations • 29 Sep 2022 • David F. Fouhey, Richard E. L. Higgins, Spiro K. Antiochos, Graham Barnes, Marc L. DeRosa, J. Todd Hoeksema, K. D. Leka, Yang Liu, Peter W. Schuck, Tamas I. Gombosi

Second, analysis of over 12, 000 scans show that the pointing information is often incorrect by dozens of arcseconds with a strong bias.

Fast and Accurate Emulation of the SDO/HMI Stokes Inversion with Uncertainty Quantification

1 code implementation • 31 Mar 2021 • Richard E. L. Higgins, David F. Fouhey, Dichang Zhang, Spiro K. Antiochos, Graham Barnes, J. Todd Hoeksema, K. D. Leka, Yang Liu, Peter W. Schuck, Tamas I. Gombosi

The Helioseismic and Magnetic Imager (HMI) onboard NASA's Solar Dynamics Observatory (SDO) produces estimates of the photospheric magnetic field which are a critical input to many space weather modelling and forecasting systems.

Uncertainty Quantification

On a limitation of Zeeman polarimetry and imperfect instrumentation in representing solar magnetic fields with weaker polarization signal

no code implementations • 18 Jan 2021 • Alexei A. Pevtsov, Yang Liu, Ilpo Virtanen, Luca Bertello, Kalevi Mursula, K. D. Leka, Anna L. H. Hughes

Full disk vector magnetic fields are used widely for developing better understanding of large-scale structure, morphology, and patterns of the solar magnetic field.

Solar and Stellar Astrophysics