DULLES, Va., Feb. 22 /PRNewswire/ -- Orbital Sciences Corporation (NYSE: ORB) announced today that is has been selected by Motorola's Commercial Government and Industrial Solutions Sector to supply in-vehicle components and control center software solutions for the new communications system for the Washington Metropolitan Area Transit Authority (WMATA). Motorola will install a new Comprehensive Radio Communications System for WMATA's police, bus, rail and maintenance departments. The fully integrated system is planned to be in place by the middle of 2003.

Orbital's Transportation Management Systems (TMS) division, based in Columbia, Maryland, will supply its state-of-the-art Mobile Data Terminal (SmartMDT) control unit for more than 1,700 buses and service vehicles. Orbital will also install its flexible, easy-to-use ORBCAD-NT communications and dispatch software system in WMATA's Operations Control Center. The ORBCAD-NT system is designed to improve WMATA's ability to manage and control its bus and service vehicle fleet.

Mr. David L. Mathisen, Vice President and General Manager of Orbital's TMS division, said, "Orbital TMS is proud to count five of the nine largest U.S. transit authorities as our customers. We are excited to be working with WMATA and to have the opportunity to showcase our transit products in our nation's capitol. Currently, all seven major transit carriers in and around the Chesapeake Bay area -- WMATA, Maryland MTA, Montgomery County Ride-On, Delaware Transit, SEPTA, Greater Richmond Transit, and Virginia Railway Express -- are using or will be installing one of our systems."

About Orbital TMS:

Orbital TMS is the country's leading supplier of satellite-based Automatic Vehicle Location (AVL) systems for the expanding Intelligent Transportation Systems (ITS) market. Orbital's AVL systems are used by 55 transit, utility and state agency customers in the U.S., with units installed, or scheduled to be installed, on approximately 22,700 vehicles. Since 1995, Orbital TMS has received over $250 million in new orders and today generates annual revenues of approximately $60 million. Employees number over 200 at its new facility in Columbia, Maryland.

More information about Orbital TMS can be found at http://www.orbital.com/TMS

About Orbital:

Orbital is one of the largest space technology and satellite services companies in the world, with 1999 total enterprise revenues (including revenues from unconsolidated affiliates) of approximately $915 million. The company, headquartered in Dulles, Virginia, employs about 4,500 people at major facilities in the U.S., Canada and several overseas locations.

Orbital is the world's leading manufacturer of low-cost space systems, including satellites and space robotics, launch vehicles, electronics and sensors, satellite ground systems and related digital infrastructure. Its Magellan subsidiary is a pioneer in satellite-based navigation and communications products for consumer and industrial markets. Through its ORBCOMM and ORBIMAGE affiliates and ORBNAV subsidiary, Orbital is also a major operator of satellite-based networks that provide data communications, high- resolution imagery and automotive information services to customers around the world.

More information about Orbital can be found at http://www.orbital.com SOURCE Orbital Sciences Corporation

CONTACT: Barron Beneski, 703-406-5000, or beneski.barron@orbital.com, or Investors: Timothy Perrott, 703-406-5997, or perrott.tim@orbital.com, both of Orbital Sciences Corporation/