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Secular variation of earth's gravitational harmonic J2 coefficient from Lageos and nontidal acceleration of earth rotationAnalysis 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.
Document ID
19830057379
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Yoder, C. F.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Williams, J. G.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Dickey, J. O.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Schutz, B. E.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Eanes, R. J.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Tapley, B. D.
(Texas, University Austin, TX, United States)
Date Acquired
August 11, 2013
Publication Date
June 30, 1983
Publication Information
Publication: Nature
Volume: 303
ISSN: 0028-0836
Subject Category
Geophysics
Accession Number
83A38597
Funding Number(s)
CONTRACT_GRANT: NAS7-918
CONTRACT_GRANT: NAS5-25991
Distribution Limits
Public
Copyright
Other

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