The U.S and ESA 1.3 tonne satellite Sentinel-6 launched today on a SpaceX Falcon-9 rocket. It is set to become the primary means of measuring the shape of the world’s oceans. It will track sea-level rise and also reveal how the great mass of waters is moving around the globe.
via Sentinel-6: ‘Dog kennel’ satellite blasts off on ocean mission – BBC News.
You can watch the launch here
https://www.youtube.com/watch?v=-qVzmza7X6w