Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-27T00:42:21.578Z Has data issue: false hasContentIssue false
  • English
  • Français

Tidal Perturbations in Astronomical Observations

Published online by Cambridge University Press:  14 August 2015

N. P. J. O'Hora  and
T. F. Baker
N. P. J. O'Hora
Affiliation:
Royal Greenwich Observatory, Herstmonceux
T. F. Baker
Affiliation:
Institute of Oceanographic Sciences, Bidston Observatory

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Twenty years of time and latitude observations made with the Herstmonceux Photographic Zenith Tube have been analysed to determine the phase and amplitude of deflexions of the local vertical at the frequency of the semi-diurnal M2 tide. The results have been compared with predictions incorporating new calculations of the gravitational attraction due to the M2 tides in the surrounding seas. The effects of the zonal Mm and Mf tides on the time observations have also been determined and compared with existing theory. In both cases the agreement is reasonably good.

Type
Part I: Time
Information
Symposium - International Astronomical Union , Volume 82: Time and the Earth's Rotation , 1979 , pp. 67 - 72
Copyright
Copyright © Reidel 1979 

References

1. Baker, T.F. 1977 Earth Tides, Crustal Structure and Ocean Tides. 8th International Symposium on Earth Tides, Bonn.Google Scholar
2. Farrell, W.E. 1972 Deformation of the Earth by Surface Loads. Reviews of Geophysics and Space Physics 10, 761–797.Google Scholar
3. Melchior, P. 1978 The Tides of the Planet Earth. Pergamon Press.Google Scholar
4. O'Hora, N.P.J. 1973 Semi-Diurnal Tidal Effects in PZT Observations. Physics of the Earth and Planetary Interiors 7, 92–96.Google Scholar
5. O'Hora, N.P.J. and Griffin, S.F. 1977 Short-period Terms in Time and Latitude Observations made with the Herstmonceux Photographic Zenith Tube. Proceedings of IAU Symposium No. 78 (in press).Google Scholar
6. Thomas, D.V. and Wallis, R.E. 1971 Results obtained with a Danjon Astrolabe at Herstmonceux. R. Obs. Bull. No. 160.Google Scholar
7. Vondrák, J. 1969 A Contribution to the Problem of Smoothing Observational Data. Bull. of the Astron. Inst. of Czechoslovakia 20, 349.Google Scholar