2026-05-02T04:42:55Zhttp://doidb.wdc-terra.org/oaip/oaioai:doidb.wdc-terra.org:72512021-11-29T09:38:43ZDOIDBDOIDB.ISGfalse4DOIDB.ISG
10.5880/isg.2014.001
Godah, Walyeldeen
Walyeldeen
Godah
0000-0002-5616-0770
Centre of Geodesy and Geodynamics, Institute of Geodesy and Cartography (IGiK), Warsaw, Poland
Krynski, Jan
Jan
Krynski
0000-0003-0695-9821
Centre of Geodesy and Geodynamics, Institute of Geodesy and Cartography (IGiK), Warsaw, Poland
The Sudanese gravimetric geoid: SUD-GM2014
GFZ Data Services
2014
Geodesy
Geoid model
ISG
Least Squares Collocation
Sudan
EARTH SCIENCE > SOLID EARTH > GEODETICS > GEOID CHARACTERISTICS
EARTH SCIENCE > SOLID EARTH > GRAVITY/GRAVITATIONAL FIELD > GRAVITY
Reguzzoni, Mirko
Mirko
Reguzzoni
0000-0002-4027-9347
International Service for the Geoid (ISG), Politecnico di Milano, Italy
Carrion, Daniela
Daniela
Carrion
0000-0003-1262-9394
International Service for the Geoid (ISG), Politecnico di Milano, Italy
Rossi, Lorenzo
Lorenzo
Rossi
0000-0001-6050-1972
International Service for the Geoid (ISG), Politecnico di Milano, Italy
Godah, Walyeldeen
Centre of Geodesy and Geodynamics, Institute of Geodesy and Cartography (IGiK), Warsaw, Poland
ISG Staff
International Service for the Geoid (ISG)
2014
Dataset
10.1007/1345_2015_196
https://archive.org/details/Moritz1980AdvancedPhysicalGeodesy
10.5194/essd-13-1653-2021
http://www.isgeoid.polimi.it/
https://www.isgeoid.polimi.it/Geoid/format_specs.html
1.0
CC BY 4.0
The Sudanese SUD-GM2014 gravimetric geoid model has been computed from the available terrestrial mean free-air gravity anomalies, the TIM-R4 GOCE-only global geopotential model, and the high-resolution SRTM30_PLUS global digital elevation model. The computation has been performed by using the remove-compute-restore procedure and the least squares collocation method. Thereafter, the SUD-GM2014 model has been evaluated by 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 the low accuracy, very limited number and inhomogeneous distribution of the used GNSS/levelling control points. The SUD-GM2014 model has been recommended as reference for GNSS heighting in Sudan.
The geoid model is provided in ISG format 2.0 (ISG Format Specifications), while the file in its original data format is available at the model ISG webpage.
The International Service for the Geoid (ISG) was founded in 1992 (as International Geoid Service - IGeS) and it is now an official service of the International Association of Geodesy (IAG), under the umbrella of the International Gravity Field Service (IGFS). The main activities of ISG consist in collecting, analysing and redistributing local and regional geoid models, as well as organizing international schools on the geoid determination (Reguzzoni et al., 2021).
Gravimetric geoid model SUD-GM2014
21.8
38.883
3.5
23.1666