The Lockheed Martin Atlas IIA rocket stands complete in the launch tower after mating of the nose fairing.

The Lockheed Martin Atlas IIA rocket stands complete in the launch tower after mating of the nose fairing. The fairing encapsulates the Tracking and Data Relay Satellite-I (TDRS-I). The second in a new series of telemetry satellites, TDRS-I replenishes the existing on-orbit fleet of six spacecraft. The TDRS System is the primary source of space-to-ground voice, data and telemetry for the Space Shuttle. It also provides communications with the International Space Station and scientific spacecraft in low-Earth orbit such as the Hubble Space Telescope. This new advanced series of satellites will extend the availability of TDRS communications services until about 2017. Launch of TDRS-I is scheduled for March 8 between 5:39 - 6:19 p.m. EST