The Earth 2.0 space mission analysis and spacecraft design

Wen Chen; Kun Chen; Yingquan Yang; Xingbo Han; Xingzi Bi; Tao He; Xuliang Duan; Jiangjiang Huang; Hong Liang; Kuoxiang Zhang; Haoyu Wang; Liu Liu; Junwang He; Genjian Qin; Jinsong Li; Tian Wang; Jian Ge; Hui Zhang; Yongshuai Zhang; Dan Zhou; Congcong Zhang; Zhenghong Tang; Yong Yu; Weicheng Zang; Shude Mao; Yonghe Chen; Xiaohua Liu; Zongxi Song; Wei Gao; Hongfei Zhang; Jian Wang

doi:10.1117/12.2629697

27 August 2022 The Earth 2.0 space mission analysis and spacecraft design

Wen Chen, Kun Chen, Yingquan Yang, Xingbo Han, Xingzi Bi, Tao He, Xuliang Duan, Jiangjiang Huang, Hong Liang, Kuoxiang Zhang, Haoyu Wang, Liu Liu, Junwang He, Genjian Qin, Jinsong Li, Tian Wang, Jian Ge, Hui Zhang, Yongshuai Zhang, Dan Zhou, Congcong Zhang, Zhenghong Tang, Yong Yu, Weicheng Zang, Shude Mao, Yonghe Chen, Xiaohua Liu, Zongxi Song, Wei Gao, Hongfei Zhang, Jian Wang

Author Affiliations +

Proceedings Volume 12180, Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave; 1218017 (2022) https://doi.org/10.1117/12.2629697
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

The Earth 2.0 (ET) mission is a Chinese next-generation space mission to detect thousands of Earth-sized terrestrial planets, including habitable Earth-like planets orbiting solar type stars (Earth 2.0s), cold low-mass planets, and freefloating planets. To meet the scientific goals, the ET spacecraft will carry six 30 cm 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, monitor ~1.2M FGKM dwarfs in the original Kepler field and its neighboring fields continuously while monitoring over 30M stars in the Galactic bulge direction. The high precision transit observations require high photometry precision and pointing stability, which is the key drive for the ET spacecraft design. In this paper, details of the overall mission modeling and analysis will be presented. The spacecraft orbit, pointing strategy, stability requirements are presented, as well as the space-ground communication analysis. The ET spacecraft adopts an ultra-high photometry precision & high stable platform, largely inherited from other space science missions. The preliminary design of spacecraft which meets mission requirements is introduced, including the spacecraft overall configuration, observation modes, avionics architecture and development plan, which pays great attention to the pointing stability and huge volume science telemetry download.

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Wen Chen, Kun Chen, Yingquan Yang, Xingbo Han, Xingzi Bi, Tao He, Xuliang Duan, Jiangjiang Huang, Hong Liang, Kuoxiang Zhang, Haoyu Wang, Liu Liu, Junwang He, Genjian Qin, Jinsong Li, Tian Wang, Jian Ge, Hui Zhang, Yongshuai Zhang, Dan Zhou, Congcong Zhang, Zhenghong Tang, Yong Yu, Weicheng Zang, Shude Mao, Yonghe Chen, Xiaohua Liu, Zongxi Song, Wei Gao, Hongfei Zhang, and Jian Wang "The Earth 2.0 space mission analysis and spacecraft design", Proc. SPIE 12180, Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave, 1218017 (27 August 2022); https://doi.org/10.1117/12.2629697

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