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Calibration procedures for the CHASE/HIS science data

Authors :
Qiu, Ye
Rao, ShiHao
Li, Chuan
Fang, Cheng
Ding, MingDe
Li, Zhen
Ni, YiWei
Wang, WenBo
Hong, Jie
Hao, Qi
Dai, Yu
Chen, PengFei
Wan, XiaoSheng
Xu, Zhi
You, Wei
Yuan, Yuan
Tao, HongJiang
Li, XianSheng
He, YuKun
Liu, Qiang
Qiu, Ye
Rao, ShiHao
Li, Chuan
Fang, Cheng
Ding, MingDe
Li, Zhen
Ni, YiWei
Wang, WenBo
Hong, Jie
Hao, Qi
Dai, Yu
Chen, PengFei
Wan, XiaoSheng
Xu, Zhi
You, Wei
Yuan, Yuan
Tao, HongJiang
Li, XianSheng
He, YuKun
Liu, Qiang
Publication Year :
2022

Abstract

The H{\alpha} line is an important optical line in solar observations containing the information from the photosphere to the chromosphere. To study the mechanisms of solar eruptions and the plasma dynamics in the lower atmosphere, the Chinese H{\alpha} Solar Explorer (CHASE) was launched into a Sun-synchronous orbit on October 14, 2021. The scientific payload of the CHASE satellite is the H{\alpha} Imaging Spectrograph (HIS). The CHASE/HIS acquires, for the first time, seeing-free H{\alpha} spectroscopic observations with high spectral and temporal resolutions. It consists of two observational modes. The raster scanning mode provides full-Sun or region-of-interest spectra at H{\alpha} (6559.7-6565.9 {\AA}) and Fe I (6567.8-6570.6 {\AA}) wavebands. The continuum imaging mode obtains full-Sun photospheric images at around 6689 {\AA}. In this paper, we present detailed calibration procedures for the CHASE/HIS science data, including the dark-field and flat-field correction, slit image curvature correction, wavelength and intensity calibration, and coordinate transformation. The higher-level data products can be directly used for scientific research.<br />Comment: 9 pages, 7 figures

Details

Database :
OAIster
Publication Type :
Electronic Resource
Accession number :
edsoai.on1363564012
Document Type :
Electronic Resource
Full Text :
https://doi.org/10.1007.s11433-022-1900-5