Work

A Global VLBI/LLR Analysis for the Determination of Precession and Nutation Constants

Year: 1991

Type: article

Abstract: Two decades of LLR data and one decade of VLBI data are combined in a global analysis to yield improved estimates of the Earth’s precession and nutation. In this analysis, LLR provides a strong determination of precession, while VLBI is stronger in fixing nutation terms with short periods. In all, 24 nutation amplitudes are estimated. The largest correlation coefficient, between precession and 18.6 yr out-of-phase nutation in longitude, is 0.88. With the exception of some 9 yr and 18.6 yr terms, formal uncertainties are 0.1 to 0.2 milliarcseconds.

Source: International Astronomical Union Colloquium

DOI: 10.1017/s0252921100063843

Authors: P. Charlot, O.J. Sovers, J.G. Williams, X X Newhall

Institutions: California Institute of Technology, Jet Propulsion Laboratory, Observatoire de Paris

Language: English

Topic: Geophysics and Gravity Measurements

Subfield: Geophysics

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: bronze

Funders: National Aeronautics and Space Administration, California Institute of Technology, Jet Propulsion Laboratory

OpenAlex ID: W200905172