分类： 天文学 >> 天文学 提交时间： 2023-02-19
Ye Qiu
ShiHao Rao
Chuan Li
Cheng Fang
MingDe Ding
Zhen Li
YiWei Ni
WenBo Wang
Jie Hong
Qi Hao
Yu Dai
PengFei Chen
XiaoSheng Wan
Zhi Xu
Wei You
Yuan Yuan
HongJiang Tao
XianSheng Li
YuKun He
Qiang Liu
摘要： 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.
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