EGU22-650, updated on 26 Mar 2022
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Investigation of different geoid computation techniques in the frame of the ModernGravNet project

Vassilios Grigoriadis1, Vassilios Andritsanos2, Dimitrios Natsiopoulos1, and Georgios Vergos1
Vassilios Grigoriadis et al.
  • 1Laboratory of Gravity Field Research and Applications - GravLab, Department of Geodesy and Surveying, Aristotle University of Thessaloniki, Thessaloniki, Greece
  • 2Department of Surveying and Geoinformatics Engineering, University of West Attica, Aigaleo, Greece

In the frame of the “Modernization of the Hellenic Gravity Network” project, we aim at computing a high resolution and accuracy geoid for Greece. For this reason, we selected initially two test areas in northern and southern Greece covering an area of about 100 km2 each, where gravity and GNSS/leveling measurements were carried out. Based on these recent, well documented and reliable measurements, we investigate the use of different techniques for the determination of the geoid, including Least-Squares Collocation, FFT and Input-Output Systems, following the Remove-Compute-Restore approach. For the remove/restore part, we examine different Residual Terrain Modeling schemes along with the use of older and recent Global Geopotential Models. Moreover, we compute the geoid-quasigeoid separation term using different approaches. We then validate the results obtained against the new GNSS/leveling measurements across the test areas and draw conclusions towards the determination of a regional geoid for Greece.

How to cite: Grigoriadis, V., Andritsanos, V., Natsiopoulos, D., and Vergos, G.: Investigation of different geoid computation techniques in the frame of the ModernGravNet project, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-650,, 2022.