Physics
Scientific paper
Jul 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.3377k&link_type=abstract
Journal of Geophysical Research, vol. 83, July 10, 1978, p. 3377-3381.
Physics
5
Error Analysis, Laser Range Finders, Lunar Rangefinding, Time Measurement, Universal Time, Data Processing, Data Reduction, Lunar Retroreflectors, Mathematical Models, Planet Ephemerides, Moon, Motion, Lunar Ranging, Laser Ranging, Ephemeris, Universal Time, Rotation, Interferometry, Orbits, Lunar Retroreflectors
Scientific paper
A least squares analysis of lunar laser ranging observations from the McDonald Observatory is used to estimate universal time. In addition to the ranging observations, the analysis simultaneously takes into account the parameters representing the locations of McDonald and the lunar retroreflectors, the orbits of the earth and the moon, and the moon's physical libration. The root-mean-square of the postfit range residuals for the 5-year period from October 1970 to November 1975 is 28 cm. The results are compared with those obtained by the Bureau International de l'Heure and by Stolz et al. (1976), and the reasons for discrepancies are discussed. It is suggested that problems in modeling the moon's motion make difficult the determination of UT with the accuracy inherent in the ranging observations.
Counselmann C. C.
King Robert W.
Shapiro Irwin I.
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