Lockheed Martin's Sixth And Final SBIRS Missile Warning Satellite Successfully Launched, Now Under U.S. Space Force Control.
SBIRS uses infrared surveillance to provide early missile warning for the U.S. military and is considered one of the nation’s highest priority space programs. The system includes a combination of satellites and hosted payloads in Geosynchronous Earth Orbit (GEO) and Highly Elliptical Orbit (HEO) and ground hardware and software.
SBIRS Missions

Missile Defense
Critical information supporting the effective operation of missile defense systems

Battlespace Awareness
Comprehensive IR data to help characterize battlespace conditions

Missile Warning
Reliable, unambiguous, timely and accurate warning for theater and strategic missile launches

Technical Intelligence
Characterize IR event signatures, phenomenology and threat performance data