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Earth Gravitational Model 2008 (EGM2008)


What's New?

  • May, 2009 - Global 2.5 Minute Geoid Undulation Grid available in GIS format.
  • February, 2009 - Middle East Geoid Undulation Grid available in GIS format.
  • February, 2009 - Propagated Error Estimates of EGM08 released.
  • January, 2009 - Utility to convert binary files from Big Endian to Small Endian released.
  • January, 2009 - Gravity Anomalies & Deflections of the Vertical data released.
  • November, 2008 - SMALL ENDIAN versions of binary files released.
  • November, 2008 - Files & Products for Oceanographic Applications released.
  • July, 2008 - WGS 84 version of EGM2008 released. Includes grids and programs for computing geoid undulations relative to WGS 84 Ellipsoid.
  • April 2008 - Original release of EGM2008 Model Coefficients from EGU General Assembly, Vienna, Austria.

The official Earth Gravitational Model EGM2008 has been publicly released by the National Geospatial-Intelligence Agency (NGA) EGM Development Team. This gravitational model is complete to spherical harmonic degree and order 2159, and contains additional 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 within these web pages. For more information, visit the links on the left side of this page.

Please provide comments, suggestions, and feedback to the contacts below as we strive to improve our EGM2008 products. Thank you!

Dr. Nikolaos Pavlis
NGA, Geodesy and Geophysics Basic and Applied Research
wgs84@nga.mil
Nikolaos.K.Pavlis@nga.mil		 NGA Office of GEOINT Sciences (SN)
EGM2008 Development Team
wgs84@nga.mil
 
Point of Contact: Office of GEOINT Sciences
phone (314) 676-9127, DSN 846-9127
wgs84@nga.mil

Document last modified May 15, 2009
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