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NASA: TDRS – The Network That Enables Exploration

Three TDRS satellites, the International Space Station (ISS) and Hubble Space Telescope orbit a blue-green Earth in this artist's concept. The TDRS network facilitates around the clock communication access between ground stations and other satellites and the ISS. Credit: NASA/Goddard Space Flight Center

Three TDRS satellites, the International Space Station (ISS) and Hubble Space Telescope orbit a blue-green Earth in this artist’s concept. The TDRS network facilitates around the clock communication access between ground stations and other satellites and the ISS. Credit: NASA/Goddard Space Flight Center

NASA is preparing to launch the second in a series of three, third generation advanced Tracking and Data Relay Satellites, known as TDRS. This latest addition to the fleet of eight, TDRS-L will augment a space communications network that provides the critical path for high data-rate communication to the International Space Station, Hubble Space Telescope, human occupied spacecraft and a host other spacecraft.

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