The Missile Defense Agency has rebranded the Missile Defense Tracking System -- a space-based sensor network envisioned to track enemy long-range ballistic and hypersonic missiles from launch to impact -- the Space Sensor Layer program and plans to brief industry this month on a second round of technology prototyping for the desired orbital capability. Early last year, MDA tapped the fledgling Space Enterprise Consortium (SpEC) to launch a prototyping campaign using other transaction authority for a capability the agency told...