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Regional geoid determination in Tierra del Fuego including GPS levelling

Authors :: Del Cogliano, D.
Dietrich, R.
Richter, A.
Perdomo, R.
Jose Luis Hormaechea
Liebsch, G.
Fritsche, M.
Source :: Geologica Acta; 2007: Vol.: 5 Núm.: 4; p. 315-322, Scopus-Elsevier, Recercat. Dipósit de la Recerca de Catalunya, instname, Recercat: Dipósit de la Recerca de Catalunya, Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya), SEDICI (UNLP), Universidad Nacional de La Plata, instacron:UNLP, Geologica Acta; Vol. 5 No 4 (2007); 315-322, Geologica Acta; Vol. 5 No. 4 (2007): GEOSUR 2004: Mesozoic to Quarternary evolution of Tierra del Fuego and neighbouring austral regions I; 315-322, Geologica Acta; Vol. 5 Núm. 4 (2007); 315-322, RCUB. Revistas Científicas de la Universidad de Barcelona, Dipòsit Digital de Documents de la UAB, Universitat Autònoma de Barcelona
Publication Year :: 2007
Publisher :: Universitat de Barcelona, 2007.
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.<br />Facultad de Ciencias Astronómicas y Geofísicas