MDA's Solution En Route to Mars

Richmond, B.C. - MacDonald, Dettwiler and Associates Ltd. (TSX: MDA), a provider of essential information solutions, announced today that its meteorological instrument package is now destined for Mars onboard the Phoenix Lander. Phoenix will land on Mars in May 2008 with several instruments on board to study the history of water on the planet.

Canada is contributing the meteorological (MET) component to this mission that will collect data about the Martian climate and weather. The MET instrument package was built by MDA in partnership with Optech Incorporated and will provide information on the current state of the Martian atmosphere-in essence a Martian weather report.

The Phoenix mission represents the first time that an MDA solution has gone beyond earth's orbit, a deliberate diversification of the company's business that will continue with solutions on the next two Mars missions as well. Funding for the Canadian MET Station is provided by the Canadian Space Agency.

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.space.gc.ca
www.optech.ca

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.