EGM2008 Model Coefficients - Original Release


The official Earth Gravitational Model EGM2008 has been publicly released by the U.S. National Geospatial-Intelligence Agency (NGA) EGM Development Team. This model is complete to degree and order 2159, and contains additional spherical harmonic coefficients extending to degree 2190 and order 2159. Full access to the model's coefficients and other descriptive files with additional details about EGM2008 are provided below. Note: Those wishing to use EGM2008 to compute geoid undulation values with respect to WGS 84 may do so using the files available at the EGM2008 - WGS 84 Version website.

Before using any of the data files on this web page, please read the disclaimer.

Model Coefficients

Additional Information

Please send any questions or comments regarding EGM2008 to:
Dr. Nikolaos Pavlis
NGA, Geodesy and Geophysics Basic and Applied Research

EGM2008 Development Team
Point of Contact: Office of Geomatics
phone (314) 676-9127, DSN 846-9127

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