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Regional Models

Sudan (SUD-GM2014)

  Authors: W. Godah, J. Krynski     Created: 2014    Resp: W. Godah 
      Status: ON DEMAND   

The Sudan gravimetric geoid model SUD-GM2014 has been computed using the TIM-R4 GOCE-only global geopotential model, available terrestrial mean free-air gravity anomalies and the high-resolution SRTM30_PLUS global digital elevation model. The computations of the SUD-GM2014 have been performed using the remove-compute-restore procedure and the least squares collocation method. Thereafter, the SUD-GM2014 has been evaluated using geoid heights at 19 GNSS/levelling points distributed over the country, showing an overall accuracy of 30 cm. However, this estimate of the geoid model quality could not be fully representative due to low accuracy, very limited number and inhomogeneous distribution of the used GNSS/levelling heights. The SUD-GM2014 model has been recommended as reference for GNSS heighting in Sudan.

W. Godah, J. Krynski (2015). A new gravimetric geoid model for the area of Sudan using the least squares collocation and a GOCE-based GGM. International Association of Geodesy Symposia, DOI: 10.1007/1345_2015_196.