Improvement of a local geoid in Tierra del Fuego

M. E. GOMEZ; A. RICHTER; L. MENDOZA

Göttinhen

Congreso; 21 Lateinamerika Kolloquium der Geowissenschaften; 2009

Geowissenschaftliches Zentrum der Georg August Universität Göttingen

Since the establishment of the nacional GPS/levelling network, several attempts to compute a geometric geoid model have been realized. Also the Fagnano lake surface has been measured in order to use it as a geopotential surface. A regional geoid model for the Argentine part of Tierra del Fuego was presented by Del Cogliano et al. 2007.In the last year a new levelling line was measured in the East West direction and the GPS coordinates of all the GPS/levelling points were referred to a new reference frame, TDF08 (Mendoza, 2008) close to ITRF. Those efforts allowed us to confirm the geoid shape and the agreement with global geopotential models, including EGM2008. At the moment, the activities are focused in the studding of a combined gravimetric/geodetic geoid model.