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Regional Models

Greece (GreekGeoid2010)


  Author: GeoGrav Group     Created: 2010    Resp: I.N. Tziavos  
      Status: PRIVATE    


Description:
Greek Geoid 2010 is a gravimetric geoid model and has been computed by the GeoGrav group at the Department of Geodesy and Surveying, Aristotle University of Thessaloniki. The area covered by the geoid is 33 ° < lat < 42 °, 18.5 ° < lon < 30 ° with a grid spacing of 2' in both latitude and in longitude. The computation is based on the remove-compute-restore technique with EGM2008 being used as a reference field. The topographic effects have been computed with the RTM reduction scheme employing a regionally-refined SRTM90m DTM and DBM. The input gravity data refer to land, marine and airborne gravity anomalies for the wider Hellenic area. The final estimation was carried our in one step for the entire region using 1D FFT and the spherical Stokes kernel. The mean accuracy of the geoid model, when compared against collocated GPS/Levelling data is at the 3-5 cm level.

References:
I.N. Tziavos, G.S. Vergos, V.N. Grigoriadis (2010). Investigation of topographic reductions and aliasing effects to gravity and the geoid over Greece based on various digital terrain models. Surveys in Geophysics, 31(3), pp. 23-67.
I.N. Tziavos, G.S. Vergos, S.P. Mertikas, A. Daskalakis, V.N. Grigoriadis, A. Tripolitsiotis (2013). The contribution of local gravimetric geoid models to the calibration of satellite altimetry data and an outlook of the latest GOCE GGM performance in GAVDOS. Advances in Space Research, 51(8), pp. 1502-1522.
G.S. Vergos, I.N. Tziavos, V.D. Andritsanos (2005). On the Determination of Marine Geoid Models by Least-Squares Collocation and Spectral Methods Using Heterogeneous Data. In: F. Sanso' (ed.), A Window on the Future of Geodesy, IAG Symposia Series, vol. 128, pp. 332-337, Springer Verlag.
G.S. Vergos, I.N. Tziavos, V.D. Andritsanos (2005). Gravity Data Base Generation and Geoid Model Estimation Using Heterogeneous Data. In: C. Jekeli, L. Bastos, J. Fernandes (eds.), Gravity Geoid and Space Missions, IAG Symposia Series, vol. 129, pp. 155-160, Springer Verlag.


Greece