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There it will stay for up to 1.5 years, gathering data for NASA and testing some new onboard devices: GPS software and a computer chip-scale atomic clock.
Source: https://mashable.com/article/nasa-moon-capstone-spacecraft
TIMEKEEPER—As part of a Defense Advanced Research Projects Agency project, Yuan-Yu Jau is working on an atomic clock at Sandia that will use the element cesium, which has a natural resonance frequency of 9,192,631,770 hertz.
Source: https://phys.org/news/2023-08-world-smallest-atomic-clock.html