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Determination of the free lunar libration modes from ephemeris DE430
Yang, Yong-Zhang1,2,3; Li, Jin-Ling1,3; Ping, Jin-Song2,3; Hanada, Hideo4
2017-12-01
发表期刊RESEARCH IN ASTRONOMY AND ASTROPHYSICS
卷号17期号:12
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.
文章类型Article
关键词Moon Physical Librations Fourier Analysis Least Squares Method
WOS标题词Science & Technology ; Physical Sciences
资助者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)
DOI10.1088/1674-4527/17/12/127
关键词[WOS]PHYSICAL LIBRATIONS ; MOON ; DISSIPATION ; PARAMETERS
收录类别SCI
语种英语
资助者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)
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000419673300009
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/20314
专题月球与深空探测研究部
作者单位1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Natl Astron Observ Japan, RISE Project, Oshu 0230861, Japan
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Yang, Yong-Zhang,Li, Jin-Ling,Ping, Jin-Song,et al. Determination of the free lunar libration modes from ephemeris DE430[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2017,17(12).
APA Yang, Yong-Zhang,Li, Jin-Ling,Ping, Jin-Song,&Hanada, Hideo.(2017).Determination of the free lunar libration modes from ephemeris DE430.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,17(12).
MLA Yang, Yong-Zhang,et al."Determination of the free lunar libration modes from ephemeris DE430".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 17.12(2017).
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