Preliminary study of marine geoid model in the Argentinean Atlantic Ocean

• Autor(a) principal: Tocho, Cláudia
• Data de Publicação: 2007
• Outros Autores: Vergos, George, Sideris, Michael G.
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Boletim de Ciências Geodésicas
• Texto Completo: https://revistas.ufpr.br/bcg/article/view/8242
• topic: marine geoid, altimetric geoid, gravimetric geoid, combined geoid, sea surface heights, heterogeneous data; geoide marino, geoide altimétrico, geoide gravimétrico, geoide combinado altura instantánea de la superficie del mar, datos heterogéneos

The objective of this paper is to present the studies conducted for the determinationof marine geoid model in the Atlantic coastal region of Argentina using satellitealtimetry and shipborne gravity data. The altimetry data of the satellite altimetrymission ERS1 and shipborne gravity data were used to compute a pure altimetricgeoid and a pure gravimetric geoid, respectively using the well known removerestoretechnique. The effect of the Quasi-Stationary Sea Surface Topography(QSST) and the effect of the Sea Surface Variability (SSV)were taken into accountduring the processing of the different solutions. From the results achieved it wasconcluded that the pure altimetric geoid has an accuracy of near 8 cm in someareas, while the pure gravimetric solution gives poorer results. The accuracy of thefinal geoid models was assessed through comparisons with stackedTOPEX/POSEIDON (T/P) SSHs, known for their high precision. In order toimprove the accuracy of the gravimetric geoid, a combined solution using theMultiple input –Multiple output system theory , known as MIMOST were used.MIMOST allow to combine heterogeneous data in the spectral domain. Thecombination of satellite and shipborne data with the proposed algorithm improvesthe accuracy of the gravimetric geoid model by about 2 cm.