ESA ESM - the updated ESA Earth System Model for Gravity Mission Simulation Studies
ESA ESM
ESA ESM is a synthetic model of the time variable gravity field of the Earth for satellite gravity simulation studies. The consist of five Earth subsystems, Atmosphere (A), Ocean (O), Hydrology (H), Ice and Glacier (I), and solid Earth (e.g., earthquakes, tectonics)(S). (Section 1.3, GFZ)
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The ESA ESM is a synthetic model of the time-variable gravity field of the Earth suitable for satellite gravity mission simulation studies. The model is an update of the ESA Earth System Model as described by Gruber et al. (2011), and is also given in spherical harmonics up to degree and order 180 for the years 1995 to 2006 with a time sampling of 6 hours. File formats and conventions follow the ICGEM standards.