technical staff at their facilities. They perform a wide range of functions, from system-level efforts such as special payload equipment and training support for NASA's Hubble Space Telescope servicing missions to component-level tasks including development of high-energy microwave transmitters for the National Radio Astronomy Observatory (NRAO). Transportation Management Systems (TMS) The TMS unit combined satellite navigation and wireless communications to enable transit control centers to manage the dispatch of public transit, highway service vehicles and commuter light rail systems. As of 2008, the technology was used by more than 60 clients, exceeding 27500 vehicles, or more than 30% of the United States and Canada fleet. TMS clients included some of the nation's largest fleet management systems, such as Los Angeles, Chicago, and Washington, D.C. In 2008, the technology services provider Affiliated Computer Services (ACS) Inc. agreed to buy the Transportation Management Systems unit for US$42.5 million. The sale transferred an estimated 130 to 140 Orbital employees based in Columbia, Maryland, to ACS. Primary facility locations Orbital's primary locations are listed below- Dulles, Virginia- corporate headquarters and primary location for Satellite Design and Manufacturing (located at 45101 "Warp Drive") Mid-Atlantic Regional Spaceport, Wallops Island, Virginia- Launch Vehicle Assembly, Testing and Launch ; Cargo Logistics Spacecraft Processing; Research Rocket Assembly, Test and Launch Chandler, Arizona - Launch Vehicle Design and Manufacturing and Program Offices Gilbert, Arizona- Satellite Design and Manufacturing Greenbelt, Maryland- Technical Services Division Vandenberg Air Force Base, California- Launch Vehicle Assembly, Test and Launch Huntington Beach, California- Southern California Engineering Center Huntsville, Alabama- Missile Defense Systems Engineering and Manufacturing Orbital products Space launch vehicles Minotaur - Employing a combination of U.S. government-supplied rocket motors and Orbital's commercial launch technologies, the Minotaur family of launchers provides low-cost access to space for government sponsored payloads. Minotaur I - Minotaur I made its inaugural flight in January 2000, successfully delivering several small military and university satellites into orbit and marking the first-ever use of residual U.S. Government Minuteman boosters in a space launch vehicle. To date, Minotaur I has conducted 11 missions with a 100% success record, having launched a total of 62 satellites. Minotaur IV - The Minotaur IV space launch vehicle consists of three Peacekeeper solid rocket stages, a commercial Orion 38 fourth-stage motor and subsystems derived from OSC's established space launch boosters, including a flight-proven standard 92-inch fairing. Capable of boosting payloads more than 1,750 kg into orbit, Minotaur IV