The GNSS stations operated by our Laboratry belong to the GNSS Active Network of Gipuzkoa, which is under permanent monitoring. Weekly, the stations of this Network, as well as additional sites are computed weekly, strictly following the EUREF guidelines.
This is the best way to detect inconsistencies in the files and to be able to accuratelly estimate velocities and other seasonal effects which, by other methodologies, could not be estimated with the needed accuracies. Moreover, this analysis allows to get additional parameters, like ZTDs.