With thermal vacuum testing having begun April 16, the next space-based missile warning satellite has reached a major milestone, the Space and Missile Systems Center announced April 24.
The Space Based Infrared System, or SBIRS, satellites use infrared surveillance to provide global missile warning capabilities for the U.S. military. The system currently consists of four satellites in geosynchronous orbit and two active satellites in highly elliptical orbits that provide full coverage of the Earth’s surface.
Read more: https://www.c4isrnet.com/battlefield-tech/space/2020/04/28/the-space-forces-next-missile-warning-satellite-is-one-step-closer-to-2021-launch/
