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Calibration procedures for the CHASE/HIS science data

第二十九届中国控制会议

作者： GUO Baiwei,LONG Sijia,LI Haiqing,ZHANG Haitao School of Aerospace,Beijing Institute of Technology,Beijing 100081,P.R.China

Simulation is an effective method to analyze the control system performance of a space-based telescope which is described by a coupling multidisciplinary model,involving mechanics,optics,controls and *** on many preview researches on simulation of space optical systems,High Level Architecture（HLA）simulation technique is considered to establish the simulation federation in this paper,which is fitter for multi-team research *** to HLA rules,the distributed simulation federation scheme including four disciplinary federates and two management federates is designed to simulate the wave-front error correction ***,HLA object model template design method,the large scale data transmission and the time management technology are respectively discussed for the simulation *** simulation result proves that the control method is correct,as well as that the HLA-based simulation scheme can be well applied in the area of multidisciplinary simulation of space-based telescopes.

关键词： space-based telescope HLA Distributed Simulation Multidisciplinary Wave-front Error Correction

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Science China(Physics,Mechanics & Astronomy) 2022年第8期65卷 10-17页

作者： 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 School of Astronomy and space Science Nanjing UniversityNanjing 210023China Key Laboratory for Modern Astronomy and Astrophysics(Nanjing University) Ministry of EducationNanjing 210023China Yunnan Observatories Chinese Academy of SciencesKunming 650216China Shanghai Institute of Satellite Engineering Shanghai 201109China Changchun Institute of Optics Fine Mechanics and PhysicsUniversity of Chinese Academy of SciencesChangchun 130033China

The Hα 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 Hα Solar Explorer(CHASE) was launched into a Sun-synchronous orbit on October 14, 2021. The scientific payload of the CHASE satellite is the Hα Imaging Spectrograph(HIS). The CHASE/HIS acquires, for the first time, seeing-free Hα 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 Hα(6559.7-6565.9 ?) and Fe I(6567.8-6570.6 ?) wavebands. The continuum imaging mode obtains full-Sun photospheric images at around 6689 ?. 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.

关键词： space-based telescope solar physics chromosphere photosphere

The Chinese Hα Solar Explorer(CHASE) mission: An overview

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Science China(Physics,Mechanics & Astronomy) 2022年第8期65卷 2-9页

作者： Chuan Li Cheng Fang Zhen Li MingDe Ding PengFei Chen Ye Qiu Wei You Yuan Yuan MinJie An HongJiang Tao XianSheng Li Zhe Chen Qiang Liu Gui Mei Liang Yang Wei Zhang WeiQiang Cheng JianXin Chen ChangYa Chen Qiang Gu QingLong Huang MingXing Liu ChengShan Han HongWei Xin ChangZheng Chen YiWei Ni WenBo Wang ShiHao Rao HaiTang Li Xi Lu Wei Wang Jun Lin YiXian Jiang LingJie Meng Jian Zhao School of Astronomy and space Science Nanjing University Key Laboratory for Modern Astronomy and Astrophysics (Nanjing University) Ministry of Education Shanghai Institute of Satellite Engineering Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Shanghai Academy of spaceflight Technology China Center for Resources Satellite Data and Application China Aerospace Science and Technology Corporation Key and Special Project Center of China National space Administration (CNSA)

The Chinese Hα Solar Explorer(CHASE), dubbed “Xihe”—Goddess of the Sun, was launched on October 14, 2021 as the first solar space mission of China National space Administration(CNSA). The CHASE mission is designed to test a newly developed satellite platform and to acquire the spectroscopic observations in the Hα waveband. The Hα Imaging Spectrograph(HIS)is the scientific payload of the CHASE satellite. It consists of two observational modes: raster scanning mode and continuum imaging mode. The raster scanning mode obtains full-Sun or region-of-interest spectral images from 6559.7 to 6565.9 ? and from 6567.8 to 6570.6 ? with 0.024 ? pixel spectral resolution and 1 min temporal resolution. The continuum imaging mode obtains photospheric images in continuum around 6689 ? with the full width at half maximum of 13.4 ?. The CHASE mission will advance our understanding of the dynamics of solar activity in the photosphere and chromosphere. In this paper, we present an overview of the CHASE mission including the scientific objectives, HIS instrument overview, data calibration flow, and first results of on-orbit observations.

关键词： space-based telescope solar physics chromosphere photosphere

On the technologies of Hα imaging spectrograph for the CHASE mission

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Science China(Physics,Mechanics & Astronomy) 2022年第8期65卷 29-36页

作者： Qiang Liu Hongjiang Tao Changzheng Chen Chengshan Han Zhe Chen Gui Mei Liang Yang Qinglong Hu Hongwei Xin Xiansheng Li Hongyu Guan Donglin Xue Mingchao Zhu Changhong Hu Qinghua Ha Yukun He Cheng Fang Chuan Li Zhen Li Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China School of Astronomy and space Science Nanjing UniversityNanjing 210023China Key Laboratory for Modern Astronomy and Astrophysics Ministry of EducationNanjing 210023China

The Hα imaging spectrograph(HIS) is the scientific payload of the first solar space mission, the Chinese Hα solar explorer(CHASE), supported by the China National space Administration(CNSA). The CHASE/HIS achieves, for the first time in space, Hα spectroscopic observations with high spectral and temporal resolutions. Separate channels for the raster scanning mode(RSM) and continuum imaging mode(CIM) are integrated into one, and a highly integrated design is achieved through multiple folding of the optical path and ultra-light miniaturized components. The design of HIS implements a number of key technologies such as high-precision scanning of the optical field of view(FOV), high-precision integrated manufacturing inspection, a large-tolerance pre-filter window, and full-link solar radiation calibration. The HIS instrument has a pixel spectral resolution of 0.024 ? and can complete a full-Sun scanning within 46 s.

关键词： space-based telescope design and performance testing of optical systems scan imaging

Introduction to the Chinese Hα Solar Explorer(CHASE)Mission

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空间科学学报 2022年第4期42卷 546-549页

作者： FANG Cheng LI Chuan School of Astronomy and space Science Nanjing UniversityNanjing 210023 Key Laboratory for Modern Astronomy and Astrophysics Ministry of EducationNanjing 210023

The Chinese HαSolar Explorer(CHASE)mission,dubbed as“Xihe”——Goddess of the Sun,was launched on 14 October 2021 as the first solar space mission of China National space Administration(CNSA).The CHASE mission aims to test an ultra-high precision and stability platform,and to acquire solar HαSpectroscopic observations with high temporal and spectral *** its launch,the in-orbit performance of the scientific payload——HαImaging Spectrograph(HIS)has been *** first set of data has been calibrated and analyzed *** CHASE science data are expected to advance our understanding of the plasma dynamics in the solar lower atmosphere,and to investigate the Sun as a star for stellar physics.

关键词： space-based telescope Solar physics Solar activities