the evaluation of sea surface topography models based on the combination of the satellite altimetry and the global geoid models in the persian gulf

one of the difficulties in using absolute altitudes is the separation between the mean open sealevel and geoid. theoretically, geoid is the base level in absolute altitudes, but practically, the mean open sealevel is used as a base level for absolute altitudes. the difference between these two levels is called as the seasurface topography. in this research, it is dealt the mean sea level modeling by using the observations of threealtimeter satellites (i.e. topex/poseidon, jason-1 and gfo) in persian gulf and then it is dealt with theevaluation of existing models of the sea surface topography based on the altimeter satellites data and the globalgeopotential geoid models (i.e. european improved gravity model of the earth by new techniques, gravityfield and steady-state ocean circulation explorer, earth gravitational model 2008. the results of this researchindicate that the sea surface topographical model resulting from the eigen06c geoid is the most precisemodel with changes range between -2.482 m and -1.511 m and mean -0.23 m.