Fetch a global grid of the geoid height.
The geoid height is the height of the geoid above (positive) or below (negative) the ellipsoid (WGS84). The data are on a regular grid with 0.5 degree spacing, which was generated from the spherical harmonic model EIGEN-6C4 [Forste_etal2014] using the ICGEM Calculation Service. See the
attrsattribute of the
xarray.Datasetfor information regarding the grid generation.
If the file isn’t already in your data directory, it will be downloaded automatically.
xarray.Dataset) – The geoid grid (in meters). Coordinates are geodetic latitude and longitude.