%0 Journal Article
%A Lacy de, María Clara
%A Rodríguez Caderot, Gracia
%A Marin, E.
%A Ruíz, A.
%A Borque, María Jesús
%A Gil, A. J.
%A Biagi, L.
%T A gravimetric geoid computation and comparison with GPS results in northern Andalusia (Spain)
%D 2001
%@ 0039-3169
%U https://hdl.handle.net/20.500.14352/57821
%X Two new GPS surveys have been carried out to check the accuracy of an existing gravimetric geoid in a test area located in northern Andalusia (Spain). The fast collocation method and the remove-restore procedure have been used for the computation of the quasigeoid model. The Spanish height system is based on orthometric heights, so the gravimetrically determined quasigeoid has been transformed to a geoid model and then compared to geoid undulations provided by GPS and levelling at benchmarks belonging to the Spanish first-order levelling network. The discrepancies between the gravimetric solution and GPS/levelling undulations amount to +/-2 cm for one survey and FS cm for another after fitting a plane to the geoid model.
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