TDRS-L is an American communications satellite which is operated by NASA as part of the Tracking and Data Relay Satellite System, which provides a multitude of communications services to a wide variety of missions.
An Atlas V with a 4 meter diameter fairing, no boosters and a single centaur upper stage engine.See Atlas Details
United Launch Alliance (ULA) is a joint venture of Lockheed Martin Space Systems and Boeing Defense, Space & Security. ULA was formed in December 2006 by combining the teams at these companies which provide spacecraft launch services to the government of the United States. ULA launches from both coasts of the US. They launch their Atlas V vehicle from LC-41 in Cape Canaveral and LC-3E at Vandeberg. Their Delta IV launches from LC-37 at Cape Canaveral and LC-6 at Vandenberg.INFO WIKI