Verification of the crust density effect on the computed Geoid by Fixed- Free Two Boundary Value Problem

Gravity field Modeling without applying of stokes's formula, requires knowledge of crust mass density for modeling of residual topography effect. However, in practice the constant density (2.67 g/cm3) is mostly used to approximate the actual density because of the difficulty and complexity of obtaining the actual density. In this paper, the effect of crust density on geoid height is studied by computation of precise geoid with gravity observation on Coastal Pars by constant density and Digital Density Model was estimated from the geological information. The numerical results shows, the accuracy of precise geoid are computed by actual Digital Density Model improve up to 25 cm in Coastal Pars.