Physics
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.303..757y&link_type=abstract
Nature (ISSN 0028-0836), vol. 303, June 30, 1983, p. 757-762.
Physics
165
Angular Acceleration, Celestial Geodesy, Earth Gravitation, Earth Rotation, Lageos (Satellite), Planetary Gravitation, Secular Variations, Annual Variations, Earth Mantle, Geodynamics, Glaciology, Satellite Orbits, Satellite Tracking, Zonal Harmonics
Scientific paper
Analysis of 5.5 years of Lageos satellite range data reveal significant residual nodal signatures: an acceleration and annual and semiannual periods. These signatures primarily reflect variations in the zonal gravitational harmonic J2 coefficient and hence the polar moment of inertia. The implied decrease of J2 = -3 x 10 to the -11th/yr is consistent with both historical observations of the nontidal acceleration of the earth's rotation and models of viscous rebound of the solid earth from the decrease in load due to the last deglaciation.
Dickey Jean O.
Eanes Richard J.
Schutz Bob E.
Tapley Byron D.
Williams James G.
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