Nutation and the Earth’s Rotation

✍ Scribed by G. A. Wilkins (auth.), E. P. Fedorov, M. L. Smith, P. L. Bender (eds.)

• Publisher: Springer Netherlands
• Year: 1980
• Tongue: English
• Leaves: 267
• Series: International Astronomical Union / Union Astronomique Internationale 78
• Edition: 1
• Category: Library

✦ Synopsis

The lAU Symposium No. 78, "Nutation and the Earth's Rotation," was held in Y~ev, USSR, from 23 to 28 May, 1977. The Organizing Committee included E. P. Fedorov and R. O. Vicente (Joint Chairmen), W. Fricke, J. Kovalevsky, P. Melchior, N. Pariisky, M. Rochester, C. Sugawa, G. Wilkins and Ya. Yatskiv, who presided over the Local Organizing Com­ mittee. The meeting was sponsored by Commission 19 and co-sponsored by Commissions 4, 8, and 31. There were 114 registered participants from 14 countries. The main topics covered were as follows: the specification of nutation in the lAU system of astronomical constants; determination of forced nutation and nearly diurnal free polar motion from astronomical observations; expected use of lunar ranging data and long baseline interferometers for precise measurement of the nutation terms; models of the internal constitution of the Earth as the basis of a new theory of nutation; the effect of the ocean and liquid core on the rotation of the Earth; and the interaction between Earth tides and nutation.

✦ Table of Contents

Front Matter....Pages i-xvi
The Specification of Nutation in the IAU System of Astronomical Constants....Pages 1-7
Some Difficulties in the Theory of Nutation....Pages 9-11
Reduction of the Past ILS Data in a Uniform System....Pages 13-16
For a Clear Terminology in the Polar Motion Investigations....Pages 17-21
Nutation and the Oppolzer’s Terms....Pages 23-32
On the Effect of the Scale Value on the Principal Nutation Terms Derived from the ILS Data....Pages 33-34
Nutation Terms Derived from the Z- and the τ-Term of the IPMS System....Pages 35-40
Fortnightly Nutation from the ILS Data....Pages 41-46
Short-Period Nutation from Observation with the Pulkovo Polar Tube....Pages 47-49
Short-Period Terms in Time and Latitude Observations Made with the Herstmonceux Photographic Zenith Tube....Pages 51-57
Nearly Diurnal Free Polar Motion Derived from Astronomical Latitude and Time Observations....Pages 59-66
Nutation and Nearly Diurnal Latitude Variations from the Data of Bright Zenith Star Observations in Poltava from 1950 to 1977....Pages 67-74
Spectrum of Latitude Variations in the Frequency Range 1.4–2.2 cpy and a Search for Nearly Diurnal Free Polar Motion....Pages 75-79
Elimination de Certains Effets dans les Observations à l’Astrolabe: Application à l’Évaluation de Corrections aux Termes Principaux de la Nutation....Pages 81-86
Corrections to Some Terms of Nutation Deduced from the Paris Astrolabe Observations....Pages 87-94
Recherche de Termes de Nutation Dans l’Analyse des Observations de Latitude Effectuées á Paris....Pages 95-108
A Determination of the Principal Term of Nutation....Pages 109-110
Spectral Analysis of Latitude Observations at Gorky and Determination of the Semi-Annual Term of Nutation....Pages 111-116
On the Adoption of Empirical Corrections to Woolard’s Nutation Theory....Pages 117-124
Expected Use of Lunar Range Data to Determine Modified Nutation Terms....Pages 127-128
The Determination of Absolute Phase of a Long Baseline Interferometer and its Application to the Precise Measurement of the Constant of Nutation....Pages 129-138
The Earth’s Constitution and the Nutations....Pages 139-151
On the Nature of the Nonhydrostatic Quadrupole Excess Moment of the Earth....Pages 153-156
On the Equation of Precession and Nutation of the Dynamically Unbalanced Earth....Pages 157-157
On the Ellipsoidal Distribution of Density in the Earth’s Interior....Pages 159-159
A Review of the Different Liquid Core Models Used for the Computation of the Dynamical Effects on Nutations and Earth Tides....Pages 161-163
A Simple Theory on the Dynamical Effects of a Stratified Fluid Core upon Nutational Motion of the Earth....Pages 165-183
Gravitational, Inertial and Toroidal Oscillations of the Outer Core and Their Related Free Wobbles....Pages 185-186
The Period of the Chandler Wobble....Pages 187-193
A Normal Mode Study of Wobble and Nutation....Pages 195-202
Local Effects on Earth Tide Observations....Pages 203-204
On the Electro-Magnetic Coupling between the Core and the Mantle of the Earth....Pages 205-208
On Random Excitation and Damping of the Polar Motion....Pages 209-209
Variations of Differences of Latitudes and of Mean Latitudes of Stations Located in the Vicinity of a Common Meridian....Pages 211-221
Earth Tide Components and Forced Nutations....Pages 225-234
Forced Nutation and Irregularity of the Rotation of the Earth....Pages 235-237
The Love Numbers of the Anelastic Earth....Pages 239-242
Global Plate Tectonics and the Secular Motion of the Pole....Pages 243-244
Report of General Discussions at IAU Symposium No. 78 on Nutation and the Earth’s Rotation....Pages 247-250
Consideration of The Resolutions....Pages 251-258
Back Matter....Pages 259-266

✦ Subjects

Astronomy, Observations and Techniques