Physics – Geophysics
Scientific paper
Jul 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.3939f&link_type=abstract
Journal of Geophysical Research, vol. 85, July 10, 1980, p. 3939-3951.
Physics
Geophysics
43
Doppler Effect, Earth-Moon System, Geodesy, Geophysics, Laser Range Finders, Lunar Gravitation, Lunar Orbiter 4, Lunar Retroreflectors, Mass Ratios, Statistical Analysis, Moon, Earth-Moon System, Geophysics, Parameters, Doppler Observations, Lunar Orbiter 4, Laser Ranging, Remote Sensing, Harmonics, Data, Gravity Fields, Distribution, Statistical Analysis, Librations, Moments Of Inertia, Mass, Tidal Effects, Comparisons, Mathematical Models
Scientific paper
Doppler tracking data from Lunar Orbiter 4 have been combined with laser ranging data from lunar retroreflectors to yield a number of geophysical and geodetic parameters for the earth and moon. This joint solution gives values of (1) the lunar principal polar moment C/M R squared = 0.3905 plus or minus 0.0023, (2) GM(E) = 398600.461 plus or minus 0.026 cu km/sq s, and (3) an earth/moon mass ratio at 81.300587 plus or minus 0.000049. Also determined are the harmonics of a complete lunar gravity field through degree and order 5, the obliquity of the lunar pole, selenocentric coordinates of the lunar retroreflectors, geocentric coordinates of the McDonald Observatory, and the lunar secular acceleration. The lunar potential Love number is weakly determined at 0.022 plus or minus 0.013, and a suprisingly large dissipation of rotational energy is inferred, though either solid body tidal dissipation or liquid core mantle interactions could be causes.
Ferrari Agnaldo José
Sinclair W. S.
Sjogren William L.
Williams James G.
Yoder Charles F.
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