NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Earth orientation from lunar laser ranging and an error analysis of polar motion servicesLunar laser ranging (LLR) data are obtained on the basis of the timing of laser pulses travelling from observatories on earth to retroreflectors placed on the moon's surface during the Apollo program. The modeling and analysis of the LLR data can provide valuable insights into earth's dynamics. The feasibility to model accurately the lunar orbit over the full 13-year observation span makes it possible to conduct relatively long-term studies of variations in the earth's rotation. A description is provided of general analysis techniques, and the calculation of universal time (UT1) from LLR is discussed. Attention is also given to a summary of intercomparisons with different techniques, polar motion results and intercomparisons, and a polar motion error analysis.
Document ID
19860026549
Document Type
Reprint (Version printed in journal)
Authors
Dickey, J. O. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Newhall, X. X. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Williams, J. G. (California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)
Date Acquired
August 12, 2013
Publication Date
September 30, 1985
Publication Information
Publication: Journal of Geophysical Research
Volume: 90
ISSN: 0148-0227
Subject Category
GEOPHYSICS
Distribution Limits
Public
Copyright
Other