The orientation of the Earth is defined by Earth orientation parameters that are measured by space geodetic techniques. The results provided by these techniques differ from each other. The method presented here combines these results in order to get a representative solution of the Earth orientation parameters. Other products of the method are improved coordinates and velocities of collocations stations distributed on six major and two minor tectonic plates. The fact that the stations lie on their plates gives us possibility to describe movements of these plates during our data interval. All new results are compared with the ones published by ITRF 2005 and presented hereafter., Vojtěch Štefka., and Obsahuje bibliografii
The combination method of results of different space geodetic techniques gives two kinds of products. On the one hand, the Earth orientation parameters (EOP) that define the orientation of the Earth in space and, on the other, the coordinates of collocation stations by them the ITRF is realized. Obtained results are based on the method developed by authors, so called “non-rigorous” combination of the data. Approximately eight-year data was successively processed in order to obtain solutions of both products, which were then compared with the results given in ITRF 2005 solution., Vojtěch Štefka, Jan Kostelecký, and Ivan Pešek., and Obsahuje bibliografii
According to the theory of plate tectonics, the Earth crust is composed of 14 to 16 major independent segments - tectonic plates. These plates are in motion relative to one another. Not all the plate boundaries are exactly defined. The paper focuses on the behaviour of tectonic plates in the collision zones. Space geodesy techniques allow us to determine precise positions and velocities of the sites on the Earth surface. The global horizontal motions of the tectonic plates were derived from the coordinates and velocities of the stations defining the International Terrestrial Reference Frame - ITRF 2005 which is based on these techniques. The method described in (Kostelecký and Zeman, 2000) was employed. In the Mediterranean area, which is a contact area between the Eurasian, the Arabian and the African plate, also relative movements of the points located along the plate boundaries were computed. Further, a continuum mechanics approach was applied to detect surface deformations on the European continent and around collision zones between the tectonic plates all over the globe., Miluše Šnajdrová and Jan Kostelecký., and Obsahuje bibliografii
The combination method of results of different space geodetic techniques was recently improved and used to process approximately eight-year data obtained by three space geodetic techniques. The results are compared with the results obtained by the old approach of this method and finally with the solutions of ITRF 2005., Vojtěch Štefka., and Obsahuje bibliografii