International VLBI Service for Geodesy and Astrometry

The International VLBI Service (IVS) is an international collaboration that uses multiple radio telescope stations worldwide to precisely observe distant cosmic sources, like quasars. These measurements help determine Earth's position, shape, and rotation with extreme accuracy. By combining data from different sites, IVS improves our understanding of Earth's dynamics and the motion of celestial objects, supporting disciplines such as geodesy, navigation, and astronomy. It is vital for advancing scientific knowledge about Earth's environment and the universe, ensuring high-precision positioning and timekeeping on a global scale.