Regional geoid determination in Tierra del Fuego including GPS levelling

Authors

  • D. Del Cogliano Universidad Nacional de La Plata.
  • R. Dietrich Institut für Planetare Geodäsie.
  • A. Richter Institut für Planetare Geodäsie.
  • R. Perdomo Universidad Nacional de La Plata.
  • J. L. Hormaechea Estación Astronómica Rio Grande.
  • G. Liebsch Bundesamt für Kartographie und Geodäsie
  • M. FRITSCHE Bundesamt für Kartographie und Geodäsie

DOI:

https://doi.org/10.1344/105.000000292

Keywords:

Geoid, Mean lake leve, Equipotential surface, GPS Buoy, Tierra del Fuego

Abstract

A regional geoid model for the Argentine part of the Isla Grande de Tierra del Fuego, established in previous works on the basis of GPS levelling, suffers a lack of observation data in the remote south-western investigation area. In order to improve the data distribution in this region, the mean lake level of Lago Fagnano has been regarded as a natural indicator for the local geoid. Using a GPS buoy and pressure tide gauges, a method to determine the mean lake surface topography with respect to the ellipsoid has been developed. It is shown that the obtained lake level geometry is essentially controlled by the regional gravity field. The derived information on the mean lake level has been included in the geoid model, which results in a more detailed and plausible representation of the regional geoid.

Author Biographies

D. Del Cogliano, Universidad Nacional de La Plata.

Facultad de Ciencias Astronómicas y Geofísicas.

R. Dietrich, Institut für Planetare Geodäsie.

Technische Universität Dresden.

A. Richter, Institut für Planetare Geodäsie.

Technische Universität Dresden.

R. Perdomo, Universidad Nacional de La Plata.

Facultad de Ciencias Astronómicas y Geofísicas.

References

Del Cogliano, D., Ormaechea, J.L., Perdomo, R., Galbán, F., Lauría, E., Ramos, G., 2001. Geoid Study in Tierra del Fuego. IAG Symposia. Vertical Reference Systems. Springer, vol. 124, 192-193.

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Richter, A., Dietrich, R., Hormaechea, J.L., Del Cogliano, D., Perdomo, R., Liebsch G., Fritsche, M., 2004. Hydrodynamics of Lago Fagnano, Tierra del Fuego. Bolletino di Geofisica teorica e applicata, 45, 274-275.

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Published

2007-01-14