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arXiv · 2303.03669

The Solar Upper Transition Region Imager (SUTRI) onboard the SATech-01 satellite

Xianyong Bai·Hui Tian·Yuanyong Deng·Zhanshan Wang·Jianfeng Yang·Xiaofeng Zhang·Yonghe Zhang·Runze Qi·Nange Wang·Yang Gao·Jun Yu·Chunling He·Zhengxiang Shen·Lun Shen·Song Guo·Zhenyong Hou·Kaifan Ji·Xingzi Bi·Wei Duan·Xiao Yang·Jiaben Lin·Ziyao Hu·Qian Song·Zihao Yang·Yajie Chen·Weidong Qiao·Wei Ge·Fu Li·Lei Jin·Jiawei He·Xiaobo Chen·Xiaocheng Zhu·Junwang He·Qi Shi·Liu Liu·Jinsong Li·Dongxiao Xu·Rui Liu·Taijie Li·Zhenggong Feng·Yamin Wang·Chengcheng Fan·Shuo Liu·Sifan Guo·Zheng Sun·Yuchuan Wu·Haiyu Li·Qi Yang·Yuyang Ye·Weichen Gu·Jiali Wu·Zhe Zhang·Yue Yu·Zeyi Ye·Pengfeng Sheng·Yifan Wang·Wenbin Li·Qiushi Huang·Zhong Zhang
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Abstract

The Solar Upper Transition Region Imager (SUTRI) onboard the Space Advanced Technology demonstration satellite (SATech-01), which was launched to a sun-synchronous orbit at a height of 500 km in July 2022, aims to test the on-orbit performance of our newly developed Sc-Si multi-layer reflecting mirror and the 2kx2k EUV CMOS imaging camera and to take full-disk solar images at the Ne VII 46.5 nm spectral line with a filter width of 3 nm. SUTRI employs a Ritchey-Chretien optical system with an aperture of 18 cm. The on-orbit observations show that SUTRI images have a field of view of 41.6'x41.6' and a moderate spatial resolution of 8" without an image stabilization system. The normal cadence of SUTRI images is 30 s and the solar observation time is about 16 hours each day because the earth eclipse time accounts for about 1/3 of SATech-01's orbit period. Approximately 15 GB data is acquired each day and made available online after processing. SUTRI images are valuable as the Ne VII 46.5 nm line is formed at a temperature regime of 0.5 MK in the solar atmosphere, which has rarely been sampled by existing solar imagers. SUTRI observations will establish connections between structures in the lower solar atmosphere and corona, and advance our understanding of various types of solar activity such as flares, filament eruptions, coronal jets and coronal mass ejections.

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Xianyong Bai, Hui Tian, Yuanyong Deng, Zhanshan Wang, Jianfeng Yang, Xiaofeng Zhang, Yonghe Zhang, Runze Qi, Nange Wang, Yang Gao, Jun Yu, Chunling He, Zhengxiang Shen, Lun Shen, Song Guo, Zhenyong Hou, Kaifan Ji, Xingzi Bi, Wei Duan, Xiao Yang, Jiaben Lin, Ziyao Hu, Qian Song, Zihao Yang, Yajie Chen, Weidong Qiao, Wei Ge, Fu Li, Lei Jin, Jiawei He, Xiaobo Chen, Xiaocheng Zhu, Junwang He, Qi Shi, Liu Liu, Jinsong Li, Dongxiao Xu, Rui Liu, Taijie Li, Zhenggong Feng, Yamin Wang, Chengcheng Fan, Shuo Liu, Sifan Guo, Zheng Sun, Yuchuan Wu, Haiyu Li, Qi Yang, Yuyang Ye, Weichen Gu, Jiali Wu, Zhe Zhang, Yue Yu, Zeyi Ye, Pengfeng Sheng, Yifan Wang, Wenbin Li, Qiushi Huang, Zhong Zhang. 2023-03-07. The Solar Upper Transition Region Imager (SUTRI) onboard the SATech-01 satellite. https://doi.org/10.1088/1674-4527/accc74

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