MacDonald, Dettwiler and Associates Ltd.
(TSE: MDA) announced today that the RADARSAT-2 Payload passed its Critical
Design Review (CDR).

The Critical Design Review marks a major milestone in the construction of
the Payload. It signifies a point in the process where the design is approved,
and the final manufacture can begin.

The satellite is made up of a Bus and a Payload. The RADARSAT-2 Bus
passed its Critical Design Review in December, 2001.

The Payload is the satellite’s sensor that captures the images. It
consists of the advanced Synthetic Aperture Radar (SAR) active phased array
antenna, as well as specific equipment required to perform such functions as
timing and control of the Payload, signal generation, distribution and
detection, and thermal control.

RADARSAT-2 is Canada’s next generation of radar satellite. MDA is the
mission prime contractor, and has an agreement with the Canadian Space Agency
to develop, build, integrate and launch the satellite – while concurrently
developing and building the associated Ground Segment.

Once launched, RADARSAT-2 will be operated by MDA.

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