Sandra Hall Magnus is an American engineer and a former NASA astronaut. She returned to Earth with the crew of STS-119 Discovery on March 28, 2009, after having spent 134 days in orbit. She was assigned to the crew of STS-135, the final mission of the Space Shuttle. She is also a licensed amateur radio operator with the call sign KE5FYE. From 2012 until 2018 Magnus was the executive director of the American Institute of Aeronautics and Astronautics.