The form below allows to transform on-line coordinates (position and velocity) between realisations (ETRFxx) of the European Terrestrial Reference System (ETRS89) and realizations (ITRFyy) of the International Terrestrial Reference System (ITRS). In case input and output coordinates are requested at different epochs, then station velocities are mandatory.
For transformations to and from the Galileo Terrestrial Reference Frame (GTRF), use ITRF. GTRF is aligned to current versions of the ITRF.
Explanation and examples are available from the following tutorial.