||||| 1. Terms of Reference

Due to differences in the definitions of the tidal parameters, it was not possible to compare the theory and the observations in the field of Earth tides (Dehant and Ducarme, 1987). Among these parameters, the tidal gravimetric factor, has been redefined in a paper by Dehant and Ducarme (1987) and the Love numbers and in a paper by Dehant (1987b). Other definitions have been proposed by Mathews et al. (1994). The first task of this working group is to agree upon one definition that one should propose for a recommendation, in view of recent other propositions for definitions.

The second task is to agree upon one tidal model which account for as many physical phenomena as possible at a precision level in agreement with the advance of the technology used for the observations. By "Tidal Model", we mean the model of the Earth's response to the lunisolar attraction (and eventually planetary). It is the Earth's transfer function computed in the theory of Earth tides. It is always computed in the frequency domain as a coefficient between the Earth's response and the tidal potential. This task implies also to consider the seismic model to be used (Earth's rheological properties).

A third task is then to agree on a final precession wanted for the tidal potential development and to propose one tidal potential or a list of tidal potentials, to be used at the given precisions.

||||| 2. List of members as sent to IAG before 1991

1. V. Dehant
2. B. Ducarme
3. J. Hinderer
4. E. Ivins
5. G. Jentzsch
6. J. Kaariainen
7. G.Y. Li
8. S.M. Molodenski
9. S. Okubo
10. Y. Tamura
11. J.M. Wahr
12. R. Wang
13. Q.W. Xi.
14. J. Zschau

||||| 3. List of members participating in the discussions in addition to the previous list

1. T. Baker
2. B. Buffett
3. D. Crossley
4. O. Francis
5. T. Hartmann
6. H.T. Hsu
7. D. McCarthy
8. P. Melchior
9. B. Richter
10. F. Roosbeek
11. H.-G. Scherneck
12. H. Schuh
13. H.-G. Wenzel
14. W. Zürn

||||| For further information contact:

This page was established in HTML 3.2 at 1996.11.28 by Hans-Georg. Wenzel

BACK to WG's (ETC Home)	PREV WG 8		/		NEXT WG 2