NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Short period tidal variations of earth rotationIt is explained that the tidal deformation of the earth's polar moment of inertia by the moon and sun cause periodic variations in rotation. The short period oscillations give rise to a meter-sized, diurnal signature in the lunar laser ranging data obtained at McDonald Observatory. A solution is given for the scale parameter k/C at fortnightly and monthly tidal frequencies. The results are compared with those obtained by other investigators and with a theoretical estimate which includes the effect of oceans and a decoupled fluid core.
Document ID
19810053846
Document Type
Reprint (Version printed in journal)
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)
Parke, M. E. (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)
Date Acquired
August 11, 2013
Publication Date
March 1, 1981
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Other