Manuel Berrocoso, José M. Enríquez de Salamanca, M. Eva Ramírez, Alberto Fernández-Ros, and Bismarck Jigena. Astronomy, Geodesy and Cartography Laboratory, Department of Mathematics, Universidad de Cádiz, Facultad de Ciencias, Campus de Puerto Real, s/n, 11510, Puerto Real (Cádiz), Spain
Deception Island (63ºS, 60ºW) is one of the few volcanoes in Antarctica presenting an active volcanism. Its last eruptions took place in 1842, 1967,1969 and 1970, with unconfirmed ones in 1912 and 1917.The tectonics and volcanism in the area make necessary the establishment of a local physical reference frame: a geoid. To determine this experimental geoid, ellipsoid and orthometric heights for several points were collected: geodetic heights were obtained from GPS observations whereas the orthometric ones were obtained from absolute gravimetric and levelling measurements. In order to calculate this surface, three different techniques have been applied: remove-restore, GPS/levelling and collocation methods.
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