PMO OpenIR
 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,Yu-Qiang5,6; 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 2019-02-12 Source Publication Earth, Planets and Space ISSN 1880-5981 Volume 71Issue:1 Corresponding Author Zhao,Chang-Yin(cyzhao@pmo.ac.cn) Abstract AbstractThe 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°\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$23.1^\circ \pm\,2.5^\circ$$\end{document}. 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. Keyword Tiangong-1 Rotational state estimation Space debris SLR DOI 10.1186/s40623-019-0996-8 Language 英语 WOS ID BMC:10.1186/s40623-019-0996-8 Publisher Springer Berlin Heidelberg Citation statistics Document Type 期刊论文 Identifier http://libir.pmo.ac.cn/handle/332002/23735 Collection 中国科学院紫金山天文台 Corresponding Author Zhao,Chang-Yin Affiliation 1.2.3.4.5.6. Recommended CitationGB/T 7714 Lin,Hou-Yuan,Zhu,Ting-Lei,Liang,Zhi-Peng,等. 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).
 Files in This Item: There are no files associated with this item.
 Related Services Recommend this item Bookmark Usage statistics Export to Endnote Google Scholar Similar articles in Google Scholar [Lin,Hou-Yuan]'s Articles [Zhu,Ting-Lei]'s Articles [Liang,Zhi-Peng]'s Articles Baidu academic Similar articles in Baidu academic [Lin,Hou-Yuan]'s Articles [Zhu,Ting-Lei]'s Articles [Liang,Zhi-Peng]'s Articles Bing Scholar Similar articles in Bing Scholar [Lin,Hou-Yuan]'s Articles [Zhu,Ting-Lei]'s Articles [Liang,Zhi-Peng]'s Articles Terms of Use No data! Social Bookmark/Share