The Copernicus Sentinel-6 Michael Freilich satellite has been launched into orbit around Earth on a SpaceX Falcon 9 rocket. The new satellite uses the latest radar altimetry technology with the objective to provide a new overview of ocean topography and advance the long-term record of sea-surface height measurements that began in 1992.
These measurements are essential for climate science, for policy-making and, ultimately, for protecting the lives of millions at risk of sea-level rise. Read more at ESA website: http://www.esa.int/Newsroom/Press_Releases/New_Copernicus_satellite_to_monitor_sea-level_rise_launched