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Langley et al. 1981
Langley, R.B., King, R.W. and Shapiro, I.I. (1981). Earth rotation from lunar laser ranging. Journal of Geophysical Research 86: doi: 10.1029/JB080i012p11913. issn: 0148-0227.

We have estimated the variation of latitude and UTO from McDonald Observatory lunar laser ranging observations for the period October 1970 to October 1979. The typical formal uncertainties of our values are about 6 mililarcseconds (marc sec) and 0.5 milliseconds (ms) of time, respectively. We compared our values of variation of latitude with those derived from pole positions determined using classical astrometric, satellite Doppler, and satellite laser ranging techniques for the period July 1976 to November 1978 when data from all of these techniques were available. This comparison shows no evidence for significant high-frequency fluctuations and, in fact, yields the smallest root-mean-square difference of 5.2 marc sec between the lunar laser ranging and the satellite Doppler values, after smoothing the latter with a Gaussian-shaped smoothing window with a full-width-at-half-maximum of about 70 days. A comparison of our UTO estimates with those calculated from the circular D smoothed pole position and UT1 values published by the Bureau International de l'Heure (1979 system) gives an rms difference of 1.5 ms for the entire 9-year span of the laser ranging data.

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Journal of Geophysical Research
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