Sbirs Satellite Activated

The U.S. Air Force’s first Space-Based Infrared System (Sbirs) satellite, designed for ballistic missile warning, has been activated. The satellite carries staring and scanning infrared sensors. The payload will now undergo calibration tests. Known as SBIRS GEO-1, the spacecraft is the first of a series of satellites designed to replace the Defense Support System spacecraft in orbit. In addition to providing missile ...