Abstract. Rigorous equations in compact symbolic matrix notation are introduced to transform coordinates and velocities between ITRF frames and modern GPS-based geocentric geodetic datums. The theory is general but after neglecting higher than second-order terms it is shown that the equations revert to the formulation currently applied in most major continental datums. We discuss several exampl...

The NNR-NUVEL-1A model, as an international standard model of the International Terrestrial Reference Frame (ITRF), should be an accurate and rigorous enough no net rotation (NNR) model. In this paper, the new inertial Q-tensor of global plates is accurately calculated with a new method, and further the total angular momentum of global plates is obtained. The result shows that the reference fra...

submitted to WPGM, 2006 The IGS precise orbits of GPS have been widely used in the world ever since the beginning of their broadcast in 1994. Major changes have taken place both in the data processing softwares and the reference frame over the years, but the orbits have not been updated. In this study we reanalyzed the GPS data from the IGS global tracking station since 1994 and compared our re...

For high-resolution regional geodetic applications, the International Terrestrial Reference Frame (ITRF) is complemented by densifications. These are realized either as multi-year solutions related to a tectonic plate (e.g., EUREF for Europe) or epoch reference frames (ERFs) capture non-linear geophysical station motions caused by, e.g., earthquakes non-tidal loading SIRGAS Latin America). GNSS...

With the advances in the field of GPS positioning and the global densification of permanent GPS tracking stations, it is now possible to determine at the highest level of accuracy the transformation parameters connecting various international terrestrial reference frame (ITRF) realizations. As a by-product of these refinements, not only the seven usual parameters of the similarity transformatio...

La oficialización del marco CR-SIRGAS implica la necesidad de transformar información vinculada al anterior a esta nueva referencia nacional. Se presentan los resultados un análisis efectuado en determinación varios conjuntos parámetros transformación entre el antiguo geodésico CR05 y CR-SIRGAS. Este proceso contempló estudio directa ambos marcos contemplando dos variantes, así como también, un...

Abstract Coordinates in global reference frames are becoming more and common positioning whereas most of the geospatial data stored registries national frames. It is therefore essential to know relation between coordinates, i.e., transformation, as accurately possible. Officially provided pan-European transformations do not account for special conditions Nordic Baltic countries, namely crustal ...

The current study focuses on the analysis of observed sea level in northern delta coast, which is considered most important region Egypt. used sea-level data are records three tide gauge stations located north delta, Alexandria, Damietta, and Port Said. Different periods had been to be analyzed get astronomical surge heights. Geotide software obtain tidal harmonic constituents. cycle sort at lo...