Precession-Nutation Estimates from Optical Astrometry 1899.7-1992.0 and Comparison with VLBI Results

Abstract

The most recent solution of Earth Orientation Parameters (EOP) from the observations made by optical astrometry from 1899.7 to 1992.0 at 33 observatories is used to estimate the corrections of the present International Astronomical Union (IAU) model of precession-nutation. Since the resolution of the solution is about 5 days, only the terms with periods of 14 days and longer are considered. The results are compared with Very Long Baseline Interferometry-based corrections of the standard precession-nutation model, and the differences are discussed.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2000
Accession Number
ADA436097

Entities

People

  • Cyril Ron
  • Jan Vondrak

Organizations

  • Czech Academy of Sciences

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Algorithms
  • Coverings
  • Czech Republic
  • Information Operations
  • Intervals
  • Latitude
  • Least Squares Method
  • Longitude
  • Observation
  • Observatories
  • Orientation (Direction)
  • Precession
  • Republic
  • Standards

Fields of Study

  • Physics

Readers

  • Astronomy and Astrophysics.
  • Calculus or Mathematical Analysis