German Earth-observation satellite with X-band radar capable of producing image data with a resolution of down to 1 metre, regardless of weather conditions, cloud cover, or darkness. Launched on 15 June 2007 from Russia’s Baikonur Cosmodrome aboard a Dnepar-1 rocket, TerraSAR-X was placed in a near-*polar orbit at an altitude of 514 kilometres and has exceeded its expected five-year lifespan. TerraSAR-X and its twin TanDEM-X have also been flying in formation since 2010 to generate the highest-resolution three-dimensional images of the Earth’s surface. Some of TerraSAR-X’s results (2017) include recording imagery of North Korea’s nuclear test site at Punggye-ri before and after the 3 September 2017 nuclear test, recording massive icebergs detaching from the Antarctic ice shelf, and imaging Puerto Rico to help first responders after Hurricane Maria.