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RTM-based omission error corrections for global geopotential models: Case study in Central Europe

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Abstract

The aim of this paper is to evaluate the effects of residual terrain model (RTM) on potential and on gravity and to point out how significant can the omission error of global geopotential models (GGMs) be and how it can influence their testing. The RTM for Central Europe is computed in the spherical approximation. The topography is modelled by spherical tesseroids and the gravitational effect of the topography is obtained as a sum of their partial gravitational effects. A detailed picture of RTM in Slovakia is shown. The testing of GOCE (Gravity Field and Steady-State Ocean Circulation Explorer) global geopotential models in Central Europe published earlier is re-evaluated with the more rigorous omission error estimation. Experimental results show significantly better agreement between the gravity anomalies computed from global geopotential models with the omission-error estimation and gravity anomalies obtained from the direct measurements. On the other hand, for height anomalies such an improvement is not observed. The results are discussed in context of the other previously published studies.

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  1. Department of Theoretical Geodesy, Faculty of Civil Engineering, Slovak University of Technology, Radlinského 11, 810 05, Bratislava, Slovakia

    Zuzana Ďuríčková & Juraj Janák

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  1. Zuzana Ďuríčková
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Correspondence to Zuzana Ďuríčková.

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Ďuríčková, Z., Janák, J. RTM-based omission error corrections for global geopotential models: Case study in Central Europe. Stud Geophys Geod 60, 622–643 (2016). https://doi.org/10.1007/s11200-015-0598-2

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  • DOI: https://doi.org/10.1007/s11200-015-0598-2

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