Dulles, Va.-based Orbital Sciences Corp.’s Transportation Management Systems (TMS) division has been awarded a $17.8 million contract by the Southeastern Pennsylvania Transportation Authority to provide and manage communications for the Philadelphia area’s paratransit system, which serves people with disabilities and seniors. The system includes a wide-area, six-site data communication system for communications between central operations and its fleet of vehicles. The company’s OrbStar mobile data terminal will be installed on each vehicle in the fleet to provide two-way communication and real-time manifest updates.