Demonstration Of MDA's On-Orbit Servicing Solutions A Success

Richmond, B.C. - MacDonald, Dettwiler and Associates Ltd. (TSX: MDA), a provider of essential information solutions, announced today that an extensive series of in-space demonstrations of solutions for on-orbit servicing have been successfully completed.

MDA provided solutions for robotic satellite servicing to the U.S. DOD’s Orbital Express program. Launched in March of this year, the Orbital Express demonstration program deployed two satellitesone designed to service the other—to demonstrate the technical feasibility of satellite servicing in space.

A key part of the mission as the program came to a conclusion. MDA’s robotic solution was utilized to execute the world's first autonomous free flyer capture. In this operation, an automated robotic vision system directed a robotic arm on one satellite to reach out and "grab" or capture the second satellite floating in space nearby.

Mission-critical operations using a complete solution involving robotics, software, avionics, sensors, cameras, lights and ground control solutions developed by MDA were integral in demonstrating the string of "world firsts" credited to the mission -

• autonomous capture of a satellite
• autonomous video survey of spacecraft
• autonomous transfer of fuel to a satellite
• robotic transfer of a battery and computer to and from a satellite

The ability to repair or refuel a satellite can rescue or extend its productive life, opening new business opportunities for satellite operators and helping governments keep national security assets operating longer.

The Orbital Express Flight Demonstration Mission is funded by the U.S. Defense Advanced Projects Agency (DARPA) and led by The Boeing Company.

On-orbit images and video available at: http://sm.mdacorporation.com

About MDA

MDA provides advanced information solutions that capture and process vast amounts of data, produce essential information, and improve the decision making and operational performance of business and government organizations worldwide.

Focused on markets and customers with strong repeat business potential, MDA delivers a broad spectrum of earth and space based information solutions, ranging from complex operational systems, to tailored information services, to electronic information products.

MDA employs more than 3,000 people in locations across the United States, the United Kingdom, and Canada. The Company's common shares trade on the Toronto Stock Exchange under the symbol TSX:MDA.

Related Websites:
www.mdacorporation.com
www.boeing.com/ids/advanced_systems/orbital.html
http://www.darpa.mil/orbitalexpress/mission_updates.html

Forward-Looking Statements

This release contains forward-looking statements and information, which reflect the current view of MacDonald, Dettwiler and Associates Ltd. with respect to future events and financial performance. Any such forward-looking statements are subject to risks and uncertainties and MDA's actual results of operations could differ materially from historical results or current expectations. Additional information on these and other potential factors that could affect MDA's financial results are detailed in documents filed from time to time with the applicable Canadian securities regulatory authorities.

The Toronto Stock Exchange has neither approved nor disapproved the form or content of this release.