Estimation of the Lunar Physical Librations
1997 ◽
Vol 165
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pp. 21-30
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Keyword(s):
AbstractThe recent long-term integration of JPL ephemeris DE403/LE403 yielded lunar physical librations covering 6000 years. A Fourier analysis of a 718-year subset of this span produced estimates of the component frequencies of the forced and free librations. A subsequent iterative least-squares estimation procedure provided precise values for phases and for time-varying amplitudes and frequencies. Two free libration modes were found; presence of a third is possible but close to the noise.
Keyword(s):
2012 ◽
Vol 21
(1)
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pp. 42-56
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2011 ◽
Vol 5
(7)
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pp. 923-933
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Keyword(s):
Keyword(s):