As Alturas Geoidais Doppleh e a Separação Elipsóide-Esferóide de Referência

Abstract

The spherical harmonic coefficients represent a model of the gravitational potential or a geopotential model truncated at the orderℓ. They represent a surface that is called a reference spheroid. The separation between the ellipsoid and the reference spheroid for GEM9, GEM10, GEM10A and GEMl0B models, have been computed. The zero order undulation using 162 Doppler undulation has been derived. The results show a slightly better fit of GEM9 model to the Doppler undulations than the other models considered.