EGM96

The NASA GSFC and NIMA Joint Geopotential Model

Greetings! Welcome to the official webpage of the NASA and NIMA joint geopotential model, EGM96. EGM96 is a spherical harmonic model of the Earth's gravitational potential complete to degree and order 360.

The model coefficients, and other products are available via anonymous FTP to cddis.gsfc.nasa.gov (cd to the directory pub/egm96/general_info/). Click here to retrieve the Model Coefficients, and other products. The major reference for this model is NASA/TP-1998-206861: The Development of the Joint NASA GSFC and NIMA Geopotential Model EGM96, F. G. Lemoine, S. C. Kenyon, J. K. Factor, R.G. Trimmer, N. K. Pavlis, D. S. Chinn, C. M. Cox, S. M. Klosko, S. B. Luthcke, M. H. Torrence, Y. M. Wang, R. G. Williamson, E. C. Pavlis, R. H. Rapp and T. R. Olson, NASA Goddard Space Flight Center, Greenbelt, Maryland, 20771 USA, July 1998.

Abstract. Table of Contents. Introduction (Section 1) The EGM96 Geoid Undulation with respect to the WGS-84 Ellipsoid. (Section 11) Summary (Section 12) ERRATA. .

EGM96 Geoid

30'x30' value of the geoid undulations from EGM96 to 360x360. The image is shown on a Robinson projection of the Earth. Geoid undulations from N. Pavlis (RITSS/NASA GSFC), and image courtesy of J. Frawley (NASA GSFC)>

Model Description.

News.

Bibliography.

How to retrieve the Model Coefficients, and other products.

Get the EGM96 Geoid Grid.

View the EGM96 geoid.

Orbit Error Predictions Using JGM-2S, EGM96S, JGM3, TEG3, and EGM96 for various satellite orbits.