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A gravimetric geoid computation and comparison with GPS results in northern Andalusia (Spain)

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Lacy de, María Clara and Rodríguez Caderot, Gracia and Marin, E. and Ruíz, A. and Borque, María Jesús and Gil, A. J. and Biagi, L. (2001) A gravimetric geoid computation and comparison with GPS results in northern Andalusia (Spain). Studia Geophysica et Geodaetica, 45 (1). pp. 55-66. ISSN 0039-3169

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Abstract

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.


Item Type:Article
Uncontrolled Keywords:GPS; levelling; Quasigeoid; Fast collocation; RTM.
Subjects:Sciences > Mathematics > Geodesy
ID Code:17791
Deposited On:21 Jan 2013 11:22
Last Modified:27 Jul 2018 08:32

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