Advertisement

Ocean loading tides in GPS and rapid variations of the frame origin

  • H. G. Scherneck
  • J. M. Johansson
  • F. H. Webb
Part of the International Association of Geodesy Symposia book series (IAG SYMPOSIA, volume 121)

Abstract

Ocean loading tides introduce earth surface displacements at the centimetre level. We show that these effects can be recovered from GP5 data using long time-series from Precise Point Positioning solutions. The formal uncertainty of the observed ocean loading parameters can be as low as half a millimetre. Observations from 11 stations are used.

We investigate whether the GPS time-series show any impact of geocentre tides. We find that this is not the case and attribute the negative finding to the way the orbit data are prepared.

Large perturbations exist at sidereal periods. We suppose that they are related to once and twice per revolution orbit errors. Other perturbations might arise due to multipathing near a receiver antenna.

Keywords

GPS ocean loading tides geocenter motion 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Eanes, R. and S. Bettadpur (1998). The CSR 3.0 global ocean tide model Center for Space Research, Technical Memorandum, CSR-TM-96-05.Google Scholar
  2. Farrell, WE . (1972). Deformation of the Earth by Surface Loads, Rev. Geophys. Space Phys10, pp.761–797CrossRefGoogle Scholar
  3. Groves, G.W. and R.W. Reynolds (1975). An orthogonalized convolution method of tide prediction. J. Geaphys. Res.$180, pp. 4131– 4138.Google Scholar
  4. Le Provost, C., ML Genco, F. Lyard, P. Vincent, and P. Canceil (1994). Spectroscopy of the world ocean tides from a finite element hydrodynamical model, J. Geophys. Res.99, pp. 24,777– 24,798.Google Scholar
  5. McCarthy, D.D. (1992). IERS Standards IERS Technical Note 13, Observatoire de Paris, FranceGoogle Scholar
  6. McCarthy, D.D. (1996). IERS ConventionsIERS Technical Note 21, Observatoire de Paris, FranceGoogle Scholar
  7. Ray, JR . (1999). Foreword In: IERS Analysis Campaign to Investigate Motions of the Geocentre. Ray, JR. (ed.), IERS Technical Note 25, Observatoire de Paris, France, pp. 1–2.Google Scholar
  8. Ray, R.D. and B.V. Sanchez (1989). Radial Deformation of the Earth by Oceanic Tidal Loading, NASA Technical Memorandum 100743, NASA, Greenbelt, MD, USAGoogle Scholar
  9. Rothacher, M. (1998). Recent Contributions of GPS to Earth Rotation and Reference Frames, Habilitation (2nd Ph.D.), University Press, University of Berne, Switzerland.Google Scholar
  10. Scherneck, H-G. (1991). A Parameterized Solid Earth Tide Model and Ocean Tide Loading Effects for Global Geodetic Baseline Measurements, Geophys. J. Int., 106, pp 677– 694.CrossRefGoogle Scholar
  11. Scherneck, H-G., and FH Webb (1999). Ocean tide loading and diurnal tidal motion of the solid Earth centre. In: IERS Analysis Campaign to Investigate Motions of the GeocentreRay, JR. (ed.), IERS Technical Note 25, Observatoire de Paris, France, pp. 83–89.Google Scholar
  12. Schwiderski, EW . (1980).On charting global ocean tides, Rev. Geophys. Space Phys.118, pp. 243– 268.CrossRefGoogle Scholar
  13. Seiler, U . (1991). Periodic changes of the angular momentum budget due to the tides of the world ocean, J. Geophga. Res.198, pp. 10,287– 10, 300.Google Scholar
  14. Tamura, Y . (1987). A harmonic development of the tide-generating potential, Bull. D’Inform. Marées Terr, 99, pp. 6813– 6855.Google Scholar
  15. Watkins, MM. and RJ Eanes (1997). Observations of tidally coherent diurnal and semidiurnal variations in the geocenter, Geophys. Res. Letters124, pp. 2231– 2234.CrossRefGoogle Scholar
  16. Webb, FH. and JF (1993). An Introduction to GIPSY/OASIS-II Precision Software for the Analysis of Data from the Global Positioning System, JPL Publ. No. D-I1088, Jet Propulsion Laboratory, Pasadena, Cal.Google Scholar
  17. Wessel, P., and WHF Smith (1995). New version of the Generic Mapping Tools released, EOS Trans. AGU, 76, p.329.CrossRefGoogle Scholar
  18. Zumberge, JF., MB Heflin, DC Jefferson, MM Watkins, FH Webb (1997). Precise point positioning for the efficient and robust analysis of GPS data from large networks. J. Geophys. Res., 102 pp. 5005–5017.CrossRefGoogle Scholar

Copyright information

© SPringer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • H. G. Scherneck
    • 1
  • J. M. Johansson
    • 1
  • F. H. Webb
    • 2
  1. 1.Onsala Space ObservatoryChalmers University of TechnologyOnsalaSweden
  2. 2.Jet Propulsion LaboratoryPasadenaUSA

Personalised recommendations