EGM2008 (Pavlis et al., 2008) is the most recent earth geopotential model complete to degree and order 2159, and contains some additional spherical harmonic coefficients up to degree 2190. It represents a spatial resolution of 5 minutes of arc (about 9 km). The scaling parameters GM , a associated with this model have the numerical values:
GM = 3986004.415 x 10⁸m³s²; a = 6378136.3 m.
The EGM2008 zero tide model is used within this investigation for the validation process. The cofficient C₂₀ of the EGM2008 zero tide model has the numerical value: C₂₀ = -0.484169317366974 x 10^-03.
In this paper, an evaluation of EGM2008 for Egypt is given. The validation data include GPS/levelling, the latest Egyptian geoid model EGGG2008, point gravity anomalies and topographic heights derived by DTM2006.0 model for Egypt. A summary of the results and a conclusion are provided at the end of the paper.