The United Launch Alliance barge Delta Mariner arrives at Port Canaveral Fla. delivering the Centaur stage of the launch vehicle.

The United Launch Alliance barge Delta Mariner arrives at Port Canaveral, Fla. delivering the Centaur stage of the launch vehicle that will boost the Tracking and Data Relay Satellite-K, or TDRS-K, into Earth orbit atop an Atlas V rocket. After off-loading, the Centaur will be transported to the Atlas Spaceflight Operations Center, ASOC, at Cape Canaveral Air Force Station to begin processing.

The TDRS-K spacecraft is part of the next-generation series in the Tracking and Data Relay Satellite System, a constellation of space-based communication satellites providing tracking, telemetry, command and high-bandwidth data return services. For more information, visit http://tdrs.gsfc.nasa.gov/ Photo credit: NASA/Charisse Nahser