Lunar dynamics and selenodesy - Results from analysis of VLBI and laser data

Details Lunar dynamics and selenodesy - Results from analysis of VLBI and laser data Lunar dynamics and selenodesy - Results from analysis of VLBI and laser data

Dec 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.6251k&link_type=abstract

Journal of Geophysical Research, vol. 81, Dec. 10, 1976, p. 6251-6256.

Other

14

Geodesy, Laser Range Finders, Lunar Orbits, Lunar Retroreflectors, Radio Interferometers, Selenology, Earth-Moon System, Libration, Lunar Gravitation, Mathematical Models, Moments Of Inertia, Radio Transmitters

Scientific paper

Very long base line interferometry (VLBI) observations of lunar radio transmitters have been combined with data from laser ranging to lunar retroreflectors to estimate simultaneously (1) parameters in models of the lunar orbit and libration and (2) the selenodetic coordinates of the radio transmitters and retroreflectors. For the ratio of the mass of the sun to that of the earth plus moon, a value of approximately 328,900.5 is obtained. The lunar moment-of-inertia ratios beta and gamma are also determined. The values and most of the uncertainties obtained for the third-degree harmonics of the moon's gravity field are comparable to those which have been obtained by others from observations of lunar-orbiting spacecraft. However, the results for the two third-degree gravity coefficients have much less uncertainty than determinations based on laser data alone. For the relative position vectors of the lunar radio transmitters and the retroreflectors, the estimates have uncertainties of about 30 m along the earth-moon direction and about 10 m in each of the two transverse coordinates.

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