The Missile Defense Agency has selected Harris, Leidos, Northrop Grumman and Raytheon to develop prototype designs for the Hypersonic and Ballistic Tracking Space Sensor program -- a project formerly called the Space Sensor Layer -- to develop a network of orbiting satellites optimized to continuously track long-range missiles from launch to impact. On Oct. 29, the Defense Department announced a 12-way competition for the HBTSS program was narrowed to four winners, each given an approximately $20 million firm-fixed price prototype...
