In this paper, we evidence an artifact due to the least square estimation method and, in particular, to the current modeling used to derive station position time series from spacegeodetic measurements. Indeed, to compute such series, we in fact estimate constant (typically over one week) updates of station positions with respect to a priori models (ITRF2000, solid Earth tides, polar tide and oc...

We analyzed one year of DORIS data to estimate daily corrections to the mean locations of the satellite antenna phase centers. For each DORIS satellite, we looked for possible biases, discontinuities, trends or annual signals. All SPOT satellites show very similar patterns, which are characterized by a significant constant bias of about 20 mm in the cross-track direction as well as a clear annu...

Linear transformations have been routinely applied in various field applications since they permit a straightforward geometric relationship between different coordinate systems. The most general form of linear transformations which is also referred to as the affine model allows coordinate transformations between non-uniformly dilated systems. This particular model is intrinsically useful for da...

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...

A combination of two independent geodetic solutions using data from close to 300 continuous GPS stations covering the central and eastern U.S. shows that surface deformation in the North American plate interior is best fit by a model that includes rigid rotation of North America with respect to ITRF2000 and a component of strain qualitatively consistent with that expected from Glacial Isostatic...