Raytheon Integrated Defense Systems has delivered its ninth AN/TPY-2 ballistic missile defense radar to the U.S. Missile Defense Agency, according to a March 19 press release from the company.

As of October, four AN/TPY-2 radars had been deployed as forward-based sensors for the U.S. Ballistic Missile Defense System, according to an MDA fact sheet. The ninth radar will be part of the U.S. Army’s fourth Terminal High Altitude Area Defense system built by Lockheed Martin.

“Delivering this ninth radar is crucial because our nation’s enemies continue to improve and proliferate their ballistic missile technology and tactics,” Dave Gulla, vice president of Raytheon Integrated Defense Systems’ Global Integrated Sensors business area, said in the release.

Raytheon said it delivered the radar six months earlier than anticipated. The company is under contract to provide three more radars to the MDA.