Sentinel-6A, also known as Jason-CS A, is a European Space Agency (ESA) and National Aeronautics and Space Administration (NASA) satellite mission designed to study sea level and ocean circulation. Launched in 2020, the Sentinel-6A satellite carries a suite of advanced instruments, including radar altimeters and radiometers, to measure the height of the ocean surface with high accuracy. These measurements are critical for understanding how sea level is changing over time and the impacts of these changes on coastal communities, ecosystems, and the global climate. The data collected by Sentinel-6A also helps to improve our understanding of ocean circulation and its role in regulating the Earth`s climate. The Sentinel-6A mission is part of the European Copernicus program, a global network of satellites dedicated to monitoring and studying the Earth`s environment.