Diurnal and Sub-Diurnal Terms of Nutation

Abstract

This paper discusses the short-period terms of nutation that are included in the recent theories of nutation for a rigid Earth. The author argues that these terms should be expressed as terrestrial perturbations (i.e., polar motion), and describes how such a transformation can be accomplished in practice. Based on the available rigid-Earth amplitudes, he estimates this lunisolar effect in polar motion for an elastic Earth with liquid core, and compares it to the oceanic and atmospheric perturbations at similar frequencies.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2000
Accession Number
ADA435815

Entities

People

  • Aleksander Brzezinski

Organizations

  • Polish Academy of Sciences

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Accuracy
  • Amplitude
  • Angular Momentum
  • Diurnal Variations
  • Excitation
  • Frequency
  • Frequency Domain
  • Geopotential
  • Longitude
  • Observation
  • Observatories
  • Ocean Tides
  • Perturbations
  • Resonant Frequency
  • Rotation
  • Spin-Orbit Interaction
  • Waves

Readers

  • Astronomy and Astrophysics.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Systems Analysis and Design