September 11, 2009

Japanese Mission enabled by MDA Communication Subsystems

Montreal, Qc. - MacDonald, Dettwiler and Associates Ltd., a leading provider of satellite systems is pleased to have contributed to the H-11 Transfer Vehicle (HTV) mission launched on September 10, 2009.

The HTV is an orbit transfer vehicle designed to transport cargo such as supplies and scientific experiments to the International Space Station (ISS). MDA in Montreal designed and built the communication subsystems on both the transfer vehicle and the Space Station for the HTV mission. These systems provide Telecommand, telemetry and Ranging for the spacecraft from launch to eventual docking with the ISS.

On board the HTV spacecraft are two MDA In-Orbit System (IOS) Transponders and also the Omni directional s-band antenna. There are also two Prox Link System (PLS) Transponders and a dedicated S-band antenna that will be used to communicate with PROX (proximity) transponders installed on the Japanese Experimental Module (JEM) on space station. The PLS system is used for the final approach to the space station prior to final docking of the HTV module.

These units were all designed, manufactured and tested in our Montreal facility using MDA's world renowned expertise and state of the art facilities at Ste Anne de Bellevue.

MDA is proud to be an on-going Canadian participant in the International Space Station program.

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 3,200 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.sm.mdacorporation.com

For more information, please contact:

Nathalie Patenaude
Manager, Public Affairs
Telephone: (514) 425-3066
E-mail: Nathalie.patenaude@mdacorporation.com