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Determination of the free lunar libration modes from ephemeris DE430

文献类型：期刊论文

作者Li, Jin-Ling2,4; Hanada, Hideo1; Yang, Yong-Zhang2,3,4; Ping, Jin-Song3,4
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2017-12-01
卷号17期号:12
关键词Moon Physical Librations Fourier Analysis Least Squares Method
DOI10.1088/1674-4527/17/12/127
文献子类Article
英文摘要The Moon's physical librations have been extensively studied, and elaborate researches have been developed for the purpose of deriving accurate modes of free librations. Our motivation comes from the Planetary and Lunar Ephemeris DE430 by JPL/NASA, which was created in April 2013, and is reported to be the most accurate lunar ephemeris today using the data from Gravity Recovery and Interior Laboratory (GRAIL). Therefore, the residuals after fitting the model have reduced owing to improvement in the libration models, and the free librations embedded in the Euler angles have also improved. We use Fourier analysis to extract the approximate frequencies from DE430 and then a quadratic interpolation method is used to determine higher accuracy frequencies. With the frequencies, the linear least-squares fitting method is employed to fit the lunar physical librations to DE430. From this analysis we identified the three modes of free physical librations, and estimated the amplitudes as 1.471'' in longitude, 0.025'' in latitude and 8.19'' x 3.31'' for the wobble, with the respective periods of 1056.16, 8806.9 and 27262.99 d. Since the free librations damp with time, they require recent excitation or a continuous stimulating mechanism in order to sustain.
WOS关键词PHYSICAL LIBRATIONS ; MOON ; DISSIPATION ; PARAMETERS
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000419673300009
资助机构National Natural Science Foundation of China(41590851) ; National Natural Science Foundation of China(41590851) ; Major State Basic Research Development Program of China(2015CB857101) ; Major State Basic Research Development Program of China(2015CB857101) ; National Natural Science Foundation of China(41590851) ; National Natural Science Foundation of China(41590851) ; Major State Basic Research Development Program of China(2015CB857101) ; Major State Basic Research Development Program of China(2015CB857101)
源URL[http://ir.bao.ac.cn/handle/114a11/20332]  
专题国家天文台_月球与深空探测研究部
作者单位1.Natl Astron Observ Japan, RISE Project, Oshu 0230861, Japan
2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Li, Jin-Ling,Hanada, Hideo,Yang, Yong-Zhang,et al. Determination of the free lunar libration modes from ephemeris DE430[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2017,17(12).
APA Li, Jin-Ling,Hanada, Hideo,Yang, Yong-Zhang,&Ping, Jin-Song.(2017).Determination of the free lunar libration modes from ephemeris DE430.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,17(12).
MLA Li, Jin-Ling,et al."Determination of the free lunar libration modes from ephemeris DE430".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 17.12(2017).

入库方式： OAI收割

来源：国家天文台

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