The official Earth Gravitational Model EGM2008 has been publicly released by the National Geospatial-Intelligence Agency (NGA) EGM Development Team. Among other new data sources, the GRACE satellite mission provided a very high resolution model of the global gravity. This gravitational model is complete to spherical harmonic degree and order 2159 (block diagonal), and contains additional coefficients extending to degree 2190 and order 2159.
The authoritative Earth Gravitational Model EGM2008 has been publicly disseminated by the National Geospatial-Intelligence Agency (NGA) EGM Development Team. One of the new data sources utilized was the GRACE satellite mission, which furnished a very high resolution model of global gravity. This gravitational model is comprehensive to spherical harmonic degree and order 2159 (block diagonal), and comprises additional coefficients extending to degree 2190 and order 2159.