The Lyman-alpha Solar Telescope (LST) for the ASO-S mission - III. data and potential diagnostics
Feng, Li1; Li, Hui1; Chen, Bo2; Li, Ying1; Susino, Roberto3; Huang, Yu1; Lu, Lei1; Ying, Bei-Li1,4; Li, Jing-Wei1; Xue, Jian-Chao1,4; Yang, Yu-Tong1,4; Hong, Jie5; Li, Jian-Ping1; Zhao, Jie1; Gan, Wei-Qun1; Zhang, Yan6
Corresponding AuthorFeng, Li(
AbstractThe Lyman-alpha Solar Telescope (LST) is one of the three payloads onboard the Advanced Space-based Solar Observatory (ASO-S) mission. It aims at imaging the Sun from the disk center up to 2.5R(circle dot) targeting solar eruptions, particularly coronal mass ejections (CMEs), solar flares, prominences/filaments and related phenomena, as well as the fast and slow solar wind. The most prominent speciality of LST is the simultaneous observation of the solar atmosphere in both Ly alpha and white light (WL) with high temporospatial resolution both on the solar disk and the inner corona. New observations in the Ly alpha line together with traditional WL observations will provide us with many new insights into solar eruptions and solar wind. LST consists of a Solar Corona Imager (SCI) with a field of view (FOV) of 1.1 - 2.5R(circle dot), a Solar Disk Imager (SDI) and a full-disk White-light Solar Telescope (WST) with an identical FOV up to 1.2R(circle dot). SCI has a dual waveband in Ly alpha (121.6 +/- 10 nm) and in WL (700 +/- 40 nm), while SDI works in the Ly alpha waveband of 121.6 +/- 7.5 nm and WST works in the violet narrow-band continuum of 360 +/- 2.0 nm. To produce high quality science data, careful ground and in-flight calibrations are required. We present our methods for different calibrations including dark field correction, flat field correction, radiometry, instrumental polarization and optical geometry. Based on the data calibration, definitions of the data levels and processing procedures for the defined levels from raw data are described. Plasma physical diagnostics offer key ingredients to understand ejecta and plasma flows in the inner corona, as well as different features on the solar disk including flares, filaments, etc. Therefore, we are making efforts to develop various tools to detect the different features observed by LST, and then to derive their physical parameters, for example, the electron density and temperature of CMEs, the outflow velocity of the solar wind, and the hydrogen density and mass flows of prominences. Coordinated observations and data analyses with the coronagraphs onboard Solar Orbiter, PROBA-3, and Aditya are also briefly discussed.
KeywordSun: coronal mass ejections (CMEs) Sun: flares Sun: solar wind techniques: calibration
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000507468400008
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Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorFeng, Li
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210033, Peoples R China
2.Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, Changchun 130033, Peoples R China
3.INAF, Turin Astrophys Observ, Via Osservatorio 20, I-10025 Pino Torinese, Italy
4.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China
5.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210023, Peoples R China
6.Nanjing Univ, Dept Comp Sci & Technol, Nanjing 210023, Peoples R China
Recommended Citation
GB/T 7714
Feng, Li,Li, Hui,Chen, Bo,et al. The Lyman-alpha Solar Telescope (LST) for the ASO-S mission - III. data and potential diagnostics[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2019,19(11):14.
APA Feng, Li.,Li, Hui.,Chen, Bo.,Li, Ying.,Susino, Roberto.,...&Zhang, Yan.(2019).The Lyman-alpha Solar Telescope (LST) for the ASO-S mission - III. data and potential diagnostics.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,19(11),14.
MLA Feng, Li,et al."The Lyman-alpha Solar Telescope (LST) for the ASO-S mission - III. data and potential diagnostics".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 19.11(2019):14.
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