RADARSAT-2 Status Update

Richmond, B.C. - MacDonald, Dettwiler and Associates Ltd. (TSX: MDA), a provider of essential information solutions, announced today that it has completed the integration and testing of Canada's next-generation Earth observation satellite, RADARSAT-2. Recently, the launch provider has experienced delays in a launch, and has rescheduled the RADARSAT-2 launch to December 2007.

RADARSAT-2 is a sophisticated Earth observation satellite developed by MDA in partnership with the Canadian Space Agency (CSA), and integrated and tested at the CSA's David Florida Laboratory in Ottawa. When launched, it will replace RADARSAT-1 and offer customers around the world an expanded range of high quality radar imagery. The RADARSAT-2 information solution captures precision images anywhere around the world, day or night, in all weather conditions, and delivers the information through a growing global network of 36 certified ground stations.

Steve Oldham, a vice president of MDA's Information Systems group stated: "MDA is very pleased to have RADARSAT-2 in this final stage ready for launch. This milestone provides confidence in the capability of the satellite to provide continuity and enhancement of RADARSAT imagery to our current and future customers."

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

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.