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The AUTh geoid based on 1D FFT with Wong-Gore modification of the Stokes kernel for the Colorado Experiment: ColFFTWG2020

Cite as:

Grigoriadis, Vassilios N.; Vergos, Georgios S. (2020): The AUTh geoid based on 1D FFT with Wong-Gore modification of the Stokes kernel for the Colorado Experiment: ColFFTWG2020. V. 1.0. GFZ Data Services. https://doi.org/10.5880/isg.2020.004

Status

I   N       R   E   V   I   E   W : Grigoriadis, Vassilios N.; Vergos, Georgios S. (2020): The AUTh geoid based on 1D FFT with Wong-Gore modification of the Stokes kernel for the Colorado Experiment: ColFFTWG2020. V. 1.0. GFZ Data Services. https://doi.org/10.5880/isg.2020.004

Abstract

The ColFFTWG2020 quasi-geoid model is a gravimetric model and has been computed by the Laboratory of Gravity Field Research and Applications, Aristotle University of Thessaloniki. The model has been computed in the frame of the International Association of Geodesy Joint Working Group 2.2.2 "The 1 cm geoid experiment" and the so called "Colorado experiment". The area covered by the models is 108.5°E ≤ longitude ≤ 103.5°E, 36.5°N ≤ latitude ≤ 38°N with a grid spacing of 2' in both latitude and in longitude.

The computation is based on the remove-compute-restore technique with XGM2106 being used as a reference field. The topographic effects were treated using a Residual Terrain Correction (RTC) by solving the spectral filter problem of RTC using Earth2014 and ERTM2160 models. The input gravity data include terrestrial and airborne data combined using Least-Squares Collocation (LSC). The final estimation was carried out using 1D FFT with Wong-Gore modification of the Stokes kernel. The accuracy of the model, when compared against GSVS17 GPS/leveling, is at 2.5 cm level.

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.

Additional Information

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).

Authors

  • Grigoriadis, Vassilios N.;School of Rural and Surveying Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece
  • Vergos, Georgios S.;School of Rural and Surveying Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece

Contact

  • Grigoriadis, Vassilios N.; School of Rural and Surveying Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece;
  • ISG Staff; International Service for the Geoid (ISG); ➦

Contributors

Reguzzoni, Mirko; Carrion, Daniela; Rossi, Lorenzo; ISG Staff

Keywords

Geodesy, Geoid model, ISG, Fast Fourier Transform, Wong-Gore Stokes kernel modification, Colorado experiment

GCMD Science Keywords

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    License: CC BY 4.0

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