TerraSAR-X

TerraSAR-X can deliver synthetic aperture radar imagery at resolutions up to 1 meter in its SpotLight imaging mode. In its high-resolution SpotLight (HS) mode, the satellite can achieve even finer detail. This makes TerraSAR-X one of the highest-resolution commercial SAR satellites in operation.

TerraSAR-X is a public-private partnership between the German Aerospace Center (DLR) and Airbus Defence and Space (formerly EADS Astrium). DLR operates the satellite and manages scientific data access, while Airbus handles commercial data distribution. A twin satellite, TanDEM-X, was launched in 2010 to form a bistatic SAR interferometer for generating global digital elevation models.

TerraSAR-X was launched on June 15, 2007, aboard a Dnepr-1 rocket from the Baikonur Cosmodrome in Kazakhstan. The mission was originally designed for a five-year operational lifetime but has continued functioning well beyond that. The satellite's longevity has made it one of the longest-serving high-resolution SAR satellites.

TerraSAR-X operates in the X-band of the electromagnetic spectrum at a frequency of approximately 9.65 GHz, which provides higher spatial resolution than L-band or C-band systems. X-band's shorter wavelengths are ideal for detailed surface mapping, infrastructure monitoring, and urban analysis. However, X-band has less penetration through vegetation canopy compared to L-band systems like ALOS-2.