Correlation Relationship between Different GGMs Data over Egypt

Abstract

Hi = hi -Ni(1)Global Geo-potential Model (GGM) defines the potential of gravitational in the spectral domain by the spherical harmonic coefficient (Tugi et al., 2016). It is used to calculate the undulation height value (Ni). Many GGMs are presented by different authors to calculate the value of undulation height (N), which will be presented in the related work section.