NASA’s final payload aboard STP-2, the Space Environment Testbeds (SET), has successfully deployed at 6:04 a.m. EDT. These instruments, hosted on the Air Force Research Lab’s Demonstration and Science Experiments spacecraft, also the final spacecraft to deploy on STP-2, will study how to protect satellites in space by characterizing the harsh space environment near Earth and how that affects a spacecraft and its instruments. Understanding this can be used to improve design and engineering in order to further protect the spacecraft from harmful radiation derived from the Sun. For more information, visit the SET mission overview site.