研究目的
To present the calibration pipeline of the level zero images obtained from the MOTH II instrument and to investigate atmospheric dynamics and Space Weather phenomena using MOTH II data.
研究成果
The MOTH II pipeline successfully calibrates and reduces data from the instrument, enabling the investigation of solar atmospheric dynamics and Space Weather phenomena. Preliminary data analysis shows potential for flare forecasting and matching with other solar data into models for magnetic loops in active regions.
研究不足
The non-ideal behavior of the polarizers causes signal leakage, requiring correction. The instrument's current version only mounts filters in K and Na lines, with additional channels in Ca and He under testing.
1：Experimental Design and Method Selection:
The MOTH II instrument uses Magneto-Optical Filters (MOFs) at 5896 ? (Na D2-line) and 7700 ? (K I-line) to provide full disk line-of-sight Doppler velocity and magnetic field measurements at two heights in the solar atmosphere. The pipeline includes standard calibration corrections, a correction for signal leakage, and geometrical registration between images.
2：Sample Selection and Data Sources:
Data are acquired from the solar atmosphere using the MOTH II instrument.
3：List of Experimental Equipment and Materials:
The instrument includes MOFs, linear polarizers, half wave retarder, and CMOS cameras.
4：Experimental Procedures and Operational Workflow:
The light beam is split into blue and red components, acquired by different CMOS cameras, resulting in 8 frames per acquisition.
5：Data Analysis Methods:
The pipeline performs photometric corrections, leakage correction, and geometrical registration to compute magnetograms and dopplergrams.
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