Conceptual Design Study of the Science Payload for the Earth 2.0 Mission
文献类型：会议论文
| 作者 | Chen, Yonghe; Yin, Dayi; Wei, Chuanxin; Liu, Xiaohua; Zhang, Quan; Yang, Baoyu; Zhu, Yuji; Ge, Jian; Zhou, Dan; Zhang, Congcong |
| 出版日期 | 2022 |
| 会议日期 | 2022-07-17 |
| 会议地点 | Montreal, CANADA |
| 关键词 | telescope transit microlensing photometry ET space instrument |
| 卷号 | 12180 |
| DOI | 10.1117/12.2630044 |
| 英文摘要 | The Earth 2.0 (ET) mission is a space mission in China which will be operated at the Earth-Sun L2 orbit with a designed lifetime longer than 4 years. ET's scientific payload consist of six 30cm diameter transit telescopes with each field of view of 500 square degrees and one 35 cm diameter microlensing telescope with a field of view of 4 square degrees. Each telescope is equipped with a camera with 2x2 9Kx9K CMOS detectors, and Front-end Electronics (FEE). Each transit telescope is an f/1.57 eight-lens refractive optical system while the microlensing telescope is an f/17.2 catadioptric optical system with diffraction-limited design. The diameter of 90% Encircled Energy (EE90) for transit telescopes is within 5x5 pixels while the FWHM of PSF for the microlensing telescope is less than 0.78 arcsec. Fine Guidance Sensors are mounted at the four edges of the CMOS camera. All seven telescopes are fixed on a common mounting reference plate, and a large sun shield is used to block the heat flow from the Sun and provide a stable thermal environment for the telescopes. It also blocks straylight form the Sun, Earth, and the Moon. Each telescope has an additional top hood to block straylight incident at a large angle while the top hood is also used as a radiator to cool the detectors to below 40 degrees C. With PID heating loops, each telescope will work at -30 +/- 0.3 degrees C while the detectors work at -40 +/- 0.1 degrees C. Details of the conceptual design for the scientific payload will be presented. |
| 产权排序 | 3 |
| 会议录 | SPACE TELESCOPES AND INSTRUMENTATION 2022: OPTICAL, INFRARED, AND MILLIMETER WAVE
 |
| 会议录出版者 | SPIE-INT SOC OPTICAL ENGINEERING |
| 语种 | 英语 |
| ISSN号 | 0277-786X;1996-756X |
| ISBN号 | 978-1-5106-5342-9 |
| WOS记录号 | WOS:000865466600123 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/96226]  |
| 专题 | 西安光学精密机械研究所_空间光学应用研究室 |
| 推荐引用方式 GB/T 7714 | Chen, Yonghe,Yin, Dayi,Wei, Chuanxin,et al. Conceptual Design Study of the Science Payload for the Earth 2.0 Mission[C]. 见:. Montreal, CANADA. 2022-07-17. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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