Gravity of the Earth at 10 arc-minute resolution

The grid is global with node spacing of 10 arc-minutes (grid-node registered) and stored in netCDF with CF-compliant metadata.

The gravity values are derived from the EIGEN-6C4 spherical harmonic model (calculated uniformly at 10 km above the WGS84 ellipsoid). Here “gravity” refers to the combined gravitational and centrifugal accelerations.

The horizontal and vertical datum is WGS84.

There are 1081 x 2161 grid points in total. Coordinates are longitude and latitude (geodetic) plus a non-dimensional coordinate height (geometric).

Format: netCDF4 with zlib compression

Load with: xarray.load_dataarray (requires the netcdf4 library)

Original source: EIGEN-6C4 model

Original license: CC-BY

Pre-processing: Source code for preparation of the original dataset for redistribution in Ensaio



version (int) – The data version to fetch. See the available versions above.


fname (pathlib.Path) – Path to the downloaded file on disk.

Examples using ensaio.fetch_earth_gravity