For immediate release: May 5, 2003

MDA Signs New RADARSAT Customer

Richmond, B.C. - MacDonald, Dettwiler and Associates Ltd. (TSX: MDA) announced today that a new customer has agreed to purchase RADARSAT data.

They'll obtain the data from MDA's RADARSAT International subsidiary for land use mapping and monitoring purposes. MDA's Information Systems Group played a key role in building the customer's ground station last year.

MDA's Phil Gray, President of RADARSAT International, said: "We continue to develop new markets for our land information products. This agreement is an example of the continuing and growing demand for RADARSAT data."

The direct reception agreement announced today is worth $1.3 million (CDN) in the first year, with a one-year renewal option

Related Websites:
www.mdacorporation.com
www.rsi.ca



For more information, please contact:

Ted Schellenberg
Media Relations
MacDonald Dettwiler
Telephone: (604) 231-2215
E-mail: teds@mda.ca