Study of the Influence of the Indirect Effect of Ocean Tides and of the Direct Deformation Effect of the Atmosphere on the Results of GPS Observations |
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| Authors: | Kostelecký Jan Zeman Antonín |
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| Institution: | (1) Research Institute of Geodesy, Topography and Cartography, Zdiby, Czech Republic;(2) Department of Advanced Geodesy, Czech Technical University, Prague, Czech Republic |
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| Abstract: | The geodynamic interpretation of the results of GPS observations among the permanently operating stations which establish the frame for defining and conserving the coordinate system and simultaneously for describing the fundamental tendencies of dynamics in the area represented by them, should be deprived of the effects of geodynamic phenomena, which can be either periodic or short-term (even non-periodic) so that secular changes may be found. Some of these influences are included in scientific processing software, others have to be modelled later. The purpose of this project is to determine the influences of the indirect effect of ocean tides and the direct deformational effect of the atmosphere on the results of GPS observations, performed at stations Pecný (Czech Republic), Wettzell (FRG) and Graz (Austria), and also for the GPS stations of the Central Europe Regional Geodynamic Project (CERGOP) in the region of Central and East Europe. On the basis of analyses and results it is possible to claim that at the present accuracy of GPS observations the influence of ocean loading and atmospheric pressure effects for geodynamic campaigns in the region of the Czech Republic is negligible. For campaigns in larger regions (i.e. Central Europe) atmospheric corrections will have to be applied to height differences. These corrections, however, due to their periodicity have negligible influence on secular changes. |
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| Keywords: | Geodesy GPS technology geodynamics |
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