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The mission, to have been funded by NASA, involved a laser-cooled caesium atomic clock, and a time-transfer system using Global Positioning System (GPS) satellites. PARCS was to fly concurrently with the Superconducting Microwave Oscillator (SUMO) [ 2 ] a different type of clock that was to be compared against the PARCS clock to test certain ...
Atomic Clock Ensemble in Space (ACES) is a project led by the European Space Agency which will place ultra-stable atomic clocks on the International Space Station. Operation in the microgravity environment of the ISS will provide a stable and accurate time base for different areas of research, including general relativity and string theory ...
Over 20 years, engineers at NASA's Jet Propulsion Laboratory have been steadily improving and miniaturizing the mercury-ion trap atomic clock. [3] The DSAC technology uses the property of mercury ions' hyperfine transition frequency at 40.50 GHz to effectively "steer" the frequency output of a quartz oscillator to a near-constant value.
Ion-clocks based on this architecture were the first to exceed the stability of H-maser clocks. Linear ion traps are now used worldwide for ion clocks, quantum computing, and quadrupole mass analyzers. He designed and delivered small ion trap physics packages for DARPA small atomic clock competitions, both the IMPACT and ACES programs.
The shuttles also had UTC clocks so that the astronauts could easily figure out what the "official" time aboard ISS was. [4] In 2019, a test flight of the Boeing CST-100 Starliner spacecraft suffered a mission anomaly through an incorrectly set Mission Elapsed Time on the vehicle. [5]
The two Mars Exploration Rovers did not use mission clocks matched to the LMST of their landing points. For mission planning purposes, they instead defined a time scale that would approximately match the clock to the apparent solar time about halfway through the nominal 90-sol primary mission.
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