DULLES, Va., May 31 /PRNewswire/ -- Orbital Sciences Corporation (NYSE: ORB) announced today that it was selected by the Naval Research Laboratory (NRL) in Washington, D.C. for a spacecraft systems support services contract, valued at $16 million for the first year. The contract also includes four one-year options that could increase the total value of the contract to $83 million over a five-year period. Won in an open competition by Orbital's Technical Services Division (TSD), part of the company's Space Systems Group, the contract calls for Orbital-supplied personnel to conduct prototype spacecraft system and subsystem research, analysis and development, as well as integration, testing, and data processing and documentation activities.

Orbital has previously supported numerous NRL spacecraft programs, including the Low Power Atmospheric Compensation Experiment (LACE), Clementine, the Interim Control Module for the International Space Station, the Naval Earthmap Observer (NEMO), Windsat, and the Microelectronics and Photonics Test Bed (MPTB).

This new contract marks the third time over the past 13 years that NRL has chosen Orbital as a supplier of technical support services. Additionally, Orbital currently has similar technical service contracts with other U.S. Government customers such as the National Aeronautics and Space Administration and the U.S. Department of Energy.

"The NRL has been a valued customer of Orbital and its predecessor companies for the past 30 years," said Mr. Richard J. Hicks, Vice President of Orbital's TSD. "We very much appreciate the NRL's continued confidence in our team, and we are committed to strengthening our already highly successful relationship well into the future."

Orbital's TSD provides technical and management support to U.S. Government agencies, typically supplying engineers, scientists, technicians and other professionals to work side-by-side with a customer's technical staff. TSD has served as a consistent source of growth for the company, with annual revenues increasing more than 100% over the past five years, from about $30 million in 1995 to approximately $70 million in 1999.

Orbital is a space and information systems company that designs, manufactures, operates and markets a broad range of affordable space infrastructure systems, satellite access products and satellite services. These products and services include satellites and other space systems, launch vehicles, electronics and sensors, satellite ground systems and land information services, satellite-based navigation and communications products, and satellite-delivered communications, Earth imaging and other information services SOURCE Orbital Sciences Corporation

/NOTE TO EDITORS: To learn more about Orbital and our Technical Services Division, as well as to access our recent press releases, please visit our Web site at http://www.orbital.com/

CONTACT: Barron Beneski of Orbital Sciences Corporation, 703-406-5000 or beneski.barron@orbital.com/