TET-1 (Technologieer-probungsträger 1) is the core element of DLR's On-Orbit Verification Program(OOV). The main aim of this program is to test new space technologies in a space environment over a period of one year. Eleven experiments will be accommodated by Kayser-Threde on board the satellite which has a mass of 120 kg. The TET-Bus is based on the BIRD satellite structure.
TET-1 was launched July 22, 2012.