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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
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
Volume17Issue:12
AbstractThe 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.
SubtypeArticle
KeywordMoon Physical Librations Fourier Analysis Least Squares Method
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationNational 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
WOS KeywordPHYSICAL LIBRATIONS ; MOON ; DISSIPATION ; PARAMETERS
Indexed BySCI
Language英语
Funding OrganizationNational 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 Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000419673300009
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/20314
Collection月球与深空探测研究部
Affiliation1.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
Recommended Citation
GB/T 7714
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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