Global Transmission Services (GTS) for transferring radio signals from the International Space Station (ISS): The antenna system was manufactured, integrated and tested by TimeTech GmbH on-board the ISS service module in December 2000. In 1999 / 2000 transmitter and receiver hardware was delivered and has been uploaded to ISS in August 2001.
GTS ModuleThe universal signal generator developed for the GTS flight unit is used as the signal source of the high-speed data link (HSDL). The generator features a digital pulse shaping filter with 8 symbols filter-depth and 10 times oversampling for generation of the square-root raised cosine shaped pulses with roll-off = 0.4. Further features are a build-in data-scrambler, a convolutional encoder and a PN-code generator. For the same GTS project TimeTech GmbH manufactured an ultra stable oscillator (USO), which is part of the GTS flight hardware.