The Atomic Oxygen Exposure Tray (AOET) was a self-standing facility located on the Spacelab D-2 support structure and performed experiments in materials science. The AOET used the Shuttle orbiter as an exposure laboratory to obtain inside reaction rate measurements of various materials interacting with atomic oxygen in the low-Earth orbital environment. The AOET consisted of a sample array containing 124 sample plates.
STS-55
