v1

Date: 2022/05/02

DOI: https://doi.org/10.5281/zenodo.6511942

Note: This is a processed and formatted version of the source dataset below. It's mean for use in documentation and tutorials of the Fatiando a Terra project. Please cite the original authors when using this dataset.

Data source: NOAA NCEI (gravity) and ETOPO1 (topography)

Changes:

• The original data were cropped to a region bounded by 25 and 32 degrees on
  longitude and -27 and -23 degrees on latitude.
• Geometric observation heights were obtained by adding geoid heights to the
  original observation heights referenced on the mean sea-level. The geoid
  heights on each observation point were obtained by interpolation of the geoid
  available in doi:
  10.5281/zenodo.5882205.
• Gravity disturbances were computed by removing the normal gravity of the
  WGS84 ellipsoid computed through Boule.
• Bouguer gravity disturbances were computed by forward modelling the
  topography using Harmonica starting
  from the topography grid provided in doi:
  10.5281/zenodo.6481379
  and using densities of 2670 kg/m³ above the ellipsoid and
  1040 - 2670 kg/m³ below the ellipsoid.

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