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    Very Long Baseline Interferometry (VLBI) tagged posts

    Signals from Distant Stars Connect Optical Atomic Clocks across Earth for the first time

    October 9, 2020, Categories  Astronomy/Space, Physics

    Fig.
    Antennas and optical lattice clocks used in the measurements

    Upper left: Transportable 2.4 m antenna installed at the INAF radio observatory in Medicina, Italy.
    Upper middle: Transportable 2.4 m antenna installed at NICT in Koganei, Japan.
    Upper right: 34 m antenna located at NICT in Kashima, Japan.
    Bottom left: The ytterbium optical lattice clock IT-Yb1, operated at INRIM in Torino, Italy.
    Bottom right: The strontium optical lattice clock NICT-Sr1, located at NICT in Koganei, Japan.

    Transportable radio telescopes could provide global high-precision comparisons of the best atomic clocks. Using radio telescopes observing distant stars, scientists have connected optical atomic clocks on different continents...

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