The precise knowledge of the time varying positions of stations at the Earth’s surface is essential for quantifying changes in the Earth system as a basis for an improved understanding of the underlying geodynamic processes. These products are fundamental for many activities, ranging from disaster prevention and mitigation, the understanding of climate change to the building and management of a prosperous and sustainable global society. The International Terrestrial Reference Frame (ITRF) provides the global frame for estimating station positions and their time variations. As primary products, the ITRF comprises precise 3-dimensional station positions (referred to a reference epoch) and constant velocities of the ITRF network stations observed by space geodetic techniques, such as Very Long Baseline Interferometry (VLBI), Satellite Laser Ranging (SLR), Global Navigation Satellite Systems (GNSS) and Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS) (Links). The ITRF computation makes use of the entire observation time series for each of the four observation techniques covering almost 40 years for VLBI and SLR, and more than 25 years for GNSS and DORIS.