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

Li, Chuan; Fang, Cheng; Li, Zhen; Ding, M. D.; Chen, Pengfei; Qiu, Ye; You, Wei; Yuan, Yuan; An, Minjie; Tao, Hong-Jiang; Li, Xiansheng; Chen, Zhe; Liu, Qiang; Mei, Gui; Yang, Liang; Zhang, Wei; Cheng, Weiqiang; Chen, Jianxin; Chen, Changya; Gu, Qing; Huang, Qinglong; Liu, MingXing; Han, Chengshan; Xin, Hongwei; Chen, Changzheng; Ni, Yiwei; Wang, Wenbo; ShiHao, Rao,; Li, HaiTang; Lu, Xueqiang; Wang, Wei; Lin, Jun; Jiang, YiXian; Meng, Lingjie; Zhao, Jun

doi:10.1007/s11433-022-1893-3

Cited by 67 publications

(38 citation statements)

References 44 publications

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“…The CHASE satellite was launched successfully from the Taiyuan Satellite Launch Center on October 14, 2021 [18]. After the satellite established its operating status, the levitated-body control experiments were performed more than 40 times with the flexible, long inter-cabin cable connected.…”

Section: Resultsmentioning

confidence: 99%

Levitated-body ultra-high pointing accuracy and stability satellite platform of the CHASE mission

Zhang

Cheng

You

et al. 2022

Sci. China Phys. Mech. Astron.

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The CHASE satellite is designed based on the novel ultra-high pointing accuracy and stability levitated-body satellite platform, which breaks the traditional idea of rigidly connecting the satellite platform and payload. When operating in orbit, the platform and payload are non-connected and spatially levitated. By separately arranging the "noisy" and "quiet" devices, the complicated influence of platform vibration on the payload pointing direction is effectively avoided. Using the novel master-slave collaborative control method, the pointing accuracy and stability of the payload are improved considerably. In this paper, the basic principles, overall scheme, control method, and engineering implementation of a levitated-body satellite platform are discussed. Combined with the CHASE mission in-orbit data, the actual attitude pointing precision and stability of a levitated-body satellite platform are analyzed and evaluated.

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Section: Resultsmentioning

confidence: 99%

Levitated-body ultra-high pointing accuracy and stability satellite platform of the CHASE mission

Zhang

Cheng

You

et al. 2022

Sci. China Phys. Mech. Astron.

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“…Chinese Hα Solar Explorer (CHASE, Li et al 2022). These missions cover a wide range of detections of the Sun and the interplanetary space by utilizing multi-wavelength and multi-layer imaging, and in-situ observations of the magnetic field and plasma parameters.…”

Section: ) Andmentioning

confidence: 99%

Solar ring mission: Building a panorama of the Sun and inner-heliosphere

Wang

Bai

Chen

et al. 2023

Advances in Space Research

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“…To date, we still do not know exactly how the Sun rotate depending on the latitude and altitude. The Chinese Hα Solar Explorer (CHASE) [7], the first space-based solar telescope of China, answers the question to a certain extent. The CHASE mission provides seeing-free spectroscopic observations of the whole solar disk at the wavebands of Si I (6560.58 Å), Fe I (6569.21 Å), and Hα (6562.81 Å) with a very high spectral resolution, which facilitates us to derive simultaneously the precise photospheric and chromospheric Dopplergrams [8].…”

mentioning

confidence: 99%

“…Up to now, the difference of the rotation rate among separate solar surface layers remains an unsolved mystery. The Chinese Hα Solar Explorer (CHASE) [7,32], the first space-based solar telescope of China launched on 14 October 2021, provides us with unique data to investigate the rotation of the photosphere and chromosphere simultaneously.…”

mentioning

confidence: 99%

Height-dependent differential rotation of the solar atmosphere determined by the CHASE spectroscopic observation

ShiHao

Fang

et al. 2023

Preprint

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Rotation is an intrinsic property of the stars including the Sun. Studying how stars rotate is essential for modeling their structure, formation and evolution [1, 2], and understanding their interaction with interplanetary environment [3, 4]. The Sun is a unique candidate that we can observe in detail and explore its rotation from the interior to the atmosphere [5, 6]. To date, we still do not know exactly how the Sun rotate depending on the latitude and altitude. The Chinese Hα Solar Explorer (CHASE) [7], the first space-based solar telescope of China, answers the question to a certain extent. The CHASE mission provides seeing-free spectroscopic observations of the whole solar disk at the wavebands of Si I (6560.58 Å), Fe I (6569.21 Å), and Hα (6562.81 Å) with a very high spectral resolution, which facilitates us to derive simultaneously the precise photospheric and chromospheric Dopplergrams [8]. It is found that the Sun rotates faster at higher surface layers from the photosphere to the chromosphere. The equatorial rotation rate is calculated to be 2.79 ± 0.01 μrad s−1 at the bottom of the photosphere, 2.83 ± 0.01 μrad s−1 at the middle photosphere, and 3.07 ± 0.02 μrad s−1 at the upper chromosphere. The ubiquitous frozen-in-plasma magnetic field probably plays the key role in producing the abnormal rotation rates of the solar atmosphere. The results have important implications for the solar dynamo processes and solar atmospheric heating problems.

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

Cited by 67 publications

References 44 publications

Levitated-body ultra-high pointing accuracy and stability satellite platform of the CHASE mission

Levitated-body ultra-high pointing accuracy and stability satellite platform of the CHASE mission

Solar ring mission: Building a panorama of the Sun and inner-heliosphere

Height-dependent differential rotation of the solar atmosphere determined by the CHASE spectroscopic observation

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