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Time and the Earth’s Rotation pp 67–72Cite as

Tidal Perturbations in Astronomical Observations

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Part of the book series: International Astronomical Union ((IAUS,volume 82))

Summary

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.

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References

  1. Baker, T.F. 1977 Earth Tides, Crustal Structure and Ocean Tides. 8th International Symposium on Earth Tides, Bonn.

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  2. Farrell, W.E. 1972 Deformation of the Earth by Surface Loads. Reviews of Geophysics and Space Physics 10, 761–797.

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  3. Melchior, P. 1978 The Tides of the Planet Earth. Pergamon Press.

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  4. O’Hora, N.P.J. 1973 Semi-Diurnal Tidal Effects in PZT Observations. Physics of the Earth and Planetary Interiors 7, 92–96.

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  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).

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  6. Thomas, D.V. and Wallis, R.E. 1971 Results obtained with a Danjon Astrolabe at Herstmonceux. R.Obs.Bull.No.160.

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  7. Vondrák, J. 1969 A Contribution to the Problem of Smoothing Observational Data. Bull, of the Astron. Inst, of Czechoslovakia 20, 349.

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Author information

Authors and Affiliations

  1. Royal Greenwich Observatory, Herstmonceux, UK

    N. P. J. O’Hora

  2. Bidston Observatory, Institute of Oceanographic Sciences, UK

    T. F. Baker

Authors
  1. N. P. J. O’Hora
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  2. T. F. Baker
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Editor information

Editors and Affiliations

  1. U.S. Naval Observatory, 34th and Massachusetts Avenue N.W., Washington, DC, USA

    Dennis D. McCarthy

  2. Royal Greenwich Observatory, Herstmonceux Castle, Hailsham, East Sussex, England

    John D. H. Pilkington

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© 1979 IAU

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O’Hora, N.P.J., Baker, T.F. (1979). Tidal Perturbations in Astronomical Observations. In: McCarthy, D.D., Pilkington, J.D.H. (eds) Time and the Earth’s Rotation. International Astronomical Union, vol 82. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-9368-6_13

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  • DOI: https://doi.org/10.1007/978-94-009-9368-6_13

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-90-277-0893-9

  • Online ISBN: 978-94-009-9368-6

  • eBook Packages: Springer Book Archive

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