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oai:docta.ucm.es:20.500.14352/503012023-08-11T07:46:05Zcom_20.500.14352_14col_20.500.14352_15

ANDALUSGeoid2002: The new gravimetric geoid model of Andalusia (southern Spain) Blazquéz, E.B. Gil, A. J. Rodríguez Caderot, Gracia Lacy de, María Clara Ruíz, J. J. 528 Geoid Fast collocation GPS Levelling Geodesia 2504 Geodesia In the 1991 the first determination of a gravimetric geoid in a test area in central Spain was computed by using least square collocation. In 1995 a gravimetric geoid in the Iberian Peninsula, Ibergeo95, was calculated by FFT. Nowadays an improved geoid of Andalusia, ANDALUSGeoid2002, has been computed by fast collocation procedure and remove-restore technique in the GRS80 Reference System. The computations have been done from 16562 free-air gravity anomaly data set, obtained from IGN (Instituto Geografico Nacional) and BGI (International Gravity Bureau), the Earth Gravity Model EGM96 and detailed (100 m x 100 m), coarse (5 km x 5 km) and reference (20 km x 20 km) digital terrain models. Relative carrier-phase GPS measurements at 69 benchmarks of the Spanish Levelling Network in Andalusia have been done. The standard deviations of differences between +/-11 cm, +/-39 cm and +/-38 cm in western, eastern and whole Andalusia, respectively. The ANDALUSGeoid2002 shows an improvement of Ibergeo95 in this territory. Servicio Geográfico del Ejército, Instituto Geográfico Nacional International Gravity Bureau have provided the Digital Terrain Model and gravity data Unidad Deptal. de Astronomía y Geodesia Fac. de Ciencias Matemáticas Instituto de Matemática Interdisciplinar (IMI) TRUE pub 2023-06-20T09:45:09Z 2023-06-20T09:45:09Z 2003-08 journal article https://hdl.handle.net/20.500.14352/50301 0039-3169 10.1023/A:1024855416688 eng restricted access application/pdf Springer