Raytheon Integrated Defense Systems has been awarded a $132 million contract modification for work on the Ballistic Missile Defense System's X-band radar.

The modification takes the total ceiling value of the deal to $1 billion.

The modification covers software maintenance, models and simulations, engineering support and test planning, execution and analysis for the X-band radar. It also covers software development.

Work will be performed in Massachusetts.

The U.S. Missile Defense Agency is the contracting activity.

Raytheon's sea-based X-band radar stands more than 250 feet high on a semi-submersible oil production platform.

The floating platform, a modified oil-drilling vessel, offers stability in high winds and storms.

A power plant, bridge, control rooms, living quarters, storage space and other infrastructure support the X-band on the platform.

The radar supports the ground-based mid-course defense phase of the missile defense system.