This thesis represents the theoretical and practical aspects of establishing a new coordinate
system on the basis of repeated GNSS observations, which is defined in five steps. First,
we determine the precise coordinates of geodetic stations that are in the second step
transformed to a global coordinate system. In the third step we determine the coordinates
of geodetic stations for the reference epoch with their corresponding velocity vectors on the
basis of repeated GNSS observations. The fourth step is establishing a proper coordinate
system performed using a time-dependent spatial transformation. On the basis of the
estimated velocity vectors in the newly established coordinate system, the geokinematic
model of the corresponding territory can be determined with the least-squares collocation
in the final, fifth step. The practical part of the thesis is based on repeated GNSS
observations in the territory of Slovenia and its surroundings over the last 20 years. The
GNSS observations were obtained for the geodetic stations of the passive GNSS network
as well as for permanent GNSS stations. Besides, our work included the establishment
of a new coordinate system, and an analysis of the precision and accuracy of the already
established coordinate system based on GNSS observations, which has been officially used
in Slovenia since 2008.
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