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Comparison of Polar Motion Results Using Lunar Laser Ranging

Published online by Cambridge University Press:  12 April 2016

J. O. Dickey ,
H. F. Fliegel  and
J. G. Williams
J. O. Dickey
Affiliation:
Jet Propulsion Laboratory California Institute of Technology Pasadena, CA 91109USA
H. F. Fliegel
Affiliation:
Jet Propulsion Laboratory California Institute of Technology Pasadena, CA 91109USA
J. G. Williams
Affiliation:
Jet Propulsion Laboratory California Institute of Technology Pasadena, CA 91109USA

Abstract

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A comparison of polar motion results from three sources [Bureau International de l’Heure (BIH), Defense Mapping Agency Hydrographic/Topographic Center (DMAHTC-Doppler), the International Polar Motion Service (IPMS)] was performed using lunar laser ranging (LLR) data. The rms errors, both of the LLR data and of the determinations of polar motion by the three services, decreased in recent times. The BIH and Doppler polar motion are comparable in quality (12 ± 6 cm for BIH values taken from August 1976 through May 1980, 14 ± 7 cm for Doppler results taken from June 1977 through May 1980). The IPMS errors were substantially larger (33 ± 7 cm for data taken from August 1976 through May 1980). All three analyses give 13 ± 3 cm as an estimate for the combined LLR modeling, fitting, and instrumental error (noise) for the last four years.

Type
Part I
Information
International Astronomical Union Colloquium , Volume 63: High-Precision Earth Rotation and Earth-Moon Dynamics , May 1981 , pp. 125 - 137
Copyright
Copyright © Reidel 1982

References

Fliegel, H.F., Dickey, J. O., and Williams, J.G.,: 198l, “Intercomparison of Lunar Laser and Traditional Determinations of Earth Rotation,” this volume, p. 85.Google Scholar
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Langley, R.B., King, R.W., and Shapiro, I.I.,: 198la, Bureau International de l’Heure Annual Report for 1980, D–17.Google Scholar
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