For immediate release: December 14, 2006

MDA Selected as Sole Supplier of Ground Station Solutions for DigitalGlobe's WorldView Customers

Richmond, B.C. - MacDonald, Dettwiler and Associates Ltd. (TSX: MDA), a provider of essential information solutions, announced today that it has been selected by DigitalGlobe, Inc., provider of the world's highest resolution commercial satellite imagery, as the exclusive supplier of ground station solutions offered by DigitalGlobe to international customers for its upcoming high resolution satellite program called WorldView.

As part of the agreement, MDA will provide DigitalGlobe's international customers with ground systems capable of programming, receiving and processing imagery from the WorldView satellites. These systems will be offered both as additions to existing satellite ground stations and as completely new ground stations. MDA is currently developing the system and the first installation is planned soon after the launch of WorldView 1.

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.

About DigitalGlobe, Inc.

Longmont, Colo.- based DigitalGlobe (www.digitalglobe.com) is the clear leader in the global commercial Earth imagery and geospatial information market. The company's technical superiority and innovation, unparalleled commitment to customer service, extensive business partner network and open systems philosophy make DigitalGlobe the preferred supplier of imagery products to government and commercial markets. DigitalGlobe's QuickBird satellite is the world's highest resolution commercial imaging system. The company's next-generation WorldView 1 is scheduled to launch in mid-2007, and WorldView 2 is anticipated to launch in 2008. The company's updated and growing ImageLibrary contains over one hundred eighty million square kilometers of global imagery for countless mapping and planning needs.

Related Websites:
www.mdacorporation.com
www.digitalglobe.com

Forward-Looking Statement

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.



For more information, please contact:

Wendy Keyzer
External Relations
MDA
Telephone: 604-231-2743
E-mail: wendy@mdacorporation.com