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Tiangong-1's accelerated self-spin before reentry
Lin, Hou-Yuan1,6; Zhu, Ting-Lei1,6; Liang, Zhi-Peng2,6; Zhao, Chang-Yin1,6; Wei, Dong1,6; Zhang, Wei1,6; Han, Xing-Wei2,6; Zhang, Hai-Feng3,6; Wei, Zhi-Bin4; Li YQ(李语强)5,6; Xiong, Jian-Ning1,6; Zhan, Jin-Wei1,6; Zhang, Chen1,6; Ping, Yi-Ding1,6; Song, Qing-Li2,6; Zhang, Hai-Tao2,6; Deng, Hua-Rong3,6
发表期刊Earth, Planets and Space
2019-12-01
卷号71期号:1
DOI10.1186/s40623-019-0996-8
产权排序第5完成单位
收录类别EI
关键词Tiangong-1 Rotational state estimation Space debris SLR
摘要

The detection and study of the rotational motion of space debris, which is affected by environmental factors, is a popular topic. However, relevant research in extremely low-orbit regions cannot be conducted due to a lack of observational data. Here, we fill in the gaps to present the rotational evolution of Tiangong-1 in the 5 months prior to reentry. Derived from the changes in the relative distance of its two corner cube reflectors from satellite laser ranging data, the angular momentum of Tiangong-1, which is relatively stable during observation, deviates from its maximum principal axis of inertia and precesses around the normal direction of the orbital plane due to gravity gradient torque at an angle of 23.1∘±2.5∘. Requiring consistency with the relationship between the angular momentum and precession rate leads to a solution for the rotation rate, which is thus found to increase. This result cannot be explained by any previously developed torque models. Hence, an atmospheric density gradient torque (ADGT) model that considers the torque generated by the change in atmospheric density with orbital altitude at the satellite scale is proposed to explain the rotational acceleration mechanism of extremely low-orbit objects. The numerical results show that the ADGT model provides a non-negligible ability to explain, but cannot fully describe, the acceleration effect. The data on the rotational evolution of Tiangong-1 can provide an important basis for aerodynamic model improvement by addressing minor factors omitted in previous models.

资助项目National Natural Science Foundation of China[11533010] ; National Natural Science Foundation of China[11703095] ; Youth Innovation Promotion Association, CAS[2018353] ; Chinese Academy of Sciences Foundation[KGFZD-135-16-012]
项目资助者National Natural Science Foundation of China[11533010, 11703095] ; Youth Innovation Promotion Association, CAS[2018353] ; Chinese Academy of Sciences Foundation[KGFZD-135-16-012]
语种英语
学科领域天文学 ; 空间天文学
学科门类理学 ; 理学::天文学
文章类型Journal article (JA)
出版者Springer Berlin Heidelberg
ISSN1343-8832
URL查看原文
EI入藏号5576378
EI分类号71.8.5.1remote Sensing: Primary Data Capture
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/19228
专题应用天文研究组
通讯作者Zhao, Chang-Yin
作者单位1.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, 210034, China;
2.Changchun Observatory, National Astronomical Observatories, Chinese Academy of Sciences, Changchun, 130117, China;
3.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, 200030, China;
4.Chinese Academy of Surveying and Mapping, Beijing, 100830, China;
5.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650216, China;
6.Key Laboratory of Space Object and Debris Observation, Chinese Academy of Sciences, Nanjing, 210034, China
推荐引用方式
GB/T 7714
Lin, Hou-Yuan,Zhu, Ting-Lei,Liang, Zhi-Peng,et al. Tiangong-1's accelerated self-spin before reentry[J]. Earth, Planets and Space,2019,71(1).
APA Lin, Hou-Yuan.,Zhu, Ting-Lei.,Liang, Zhi-Peng.,Zhao, Chang-Yin.,Wei, Dong.,...&Deng, Hua-Rong.(2019).Tiangong-1's accelerated self-spin before reentry.Earth, Planets and Space,71(1).
MLA Lin, Hou-Yuan,et al."Tiangong-1's accelerated self-spin before reentry".Earth, Planets and Space 71.1(2019).
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