Integral Systems to Provide KOREASAT-6 Satellite Command and Control

12th Orbital STAR Communications Satellite Supported By Integral Systems

Integral Systems, Inc., (NASDAQ:ISYS) today announced a contract signing with Orbital Sciences Corporation (“Orbital”) to provide the KT Corporation with primary and backup satellite command and control systems for KOREASAT-6, a STAR satellite built by Orbital with Thales Alenia Space France acting as prime contractor. KT Corporation, a premier satellite communications company in the Asia Pacific region, will be the 29th GEO communications satellite owner using Integral Systems’ EPOCH Integrated Product Suite (IPS) software to ensure safe and efficient satellite operations. KOREASAT-6 is the 12th Orbital satellite supported by Integral Systems.

Under the terms of the contract, Integral Systems will provide an integrated solution leveraging its complete EPOCH IPS as well as the Compass software products of its subsidiary, Newpoint Technologies. EPOCH IPS is used by operators worldwide to support real-time and historical telemetry processing, commanding, data archiving, retrieval and display, and flight dynamics for both individual satellites and fleets, regardless of manufacturer. Newpoint Technologies’ Compass suite provides network and equipment management solutions for data, Internet, satellite, broadcast, telecom, and hybrid network applications.

“Orbital is pleased to once again team with Integral Systems as partners in delivering to our end customer, KT Corporation, satellite services for the Korean population,” said William Cook, KOREASAT-6 Program Manager. “Integral Systems’ role in delivering a high performance and quality ground system is key to the success of the K6 program. Orbital’s selection of Integral Systems demonstrates our confidence that they will meet the challenges associated with design and development of complex network designs.”

“Integral Systems is proud to be working with Orbital and in doing so, help contribute to the successful execution of the KOREASAT-6 program for KT Corporation,” said Mark Schmitt, Vice President of American Operations for Integral Systems’ Commercial Group. “With this program, we both welcome the addition of KT Corporation, a highly skilled and respected satellite operator, to our large and growing EPOCH user community and our continued relationship with Orbital, one of today’s leading satellite manufacturers.”

About Integral Systems

Integral Systems, Inc., applies more than 25 years experience to provide integrated technology solutions for SATCOM-interfaced networks. Customers have relied on the Integral Systems family of companies (Integral Systems Europe, Lumistar, Inc., Newpoint Technologies, Inc., RT Logic, and SAT Corporation) to deliver on time and on budget for more than 250 satellite missions. Our dedication to customer service has solidified long-term relationships with the U.S. Air Force, NASA, NOAA, and nearly every satellite operator in the world. Integral Systems is listed in Forbes’ Top 200 Small Companies in America for 2008.

For more information visit www.integ.com.

ABOUT ORBITAL SCIENCES CORPORATION

Orbital develops and manufactures small- and medium-class rockets and space systems for commercial, military and civil government customers. The company’s primary products are satellites and launch vehicles, including low-Earth orbit, geosynchronous-Earth orbit and planetary spacecraft for communications, remote sensing, scientific and defense missions; human-rated space systems for Earth-orbit, lunar and other missions; ground- and air-launched rockets that deliver satellites into orbit; and missile defense systems that are used as interceptor and target vehicles. Orbital also provides satellite subsystems and space-related technical services to government agencies and laboratories.

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