F4, the latest cesium fountain clock that now stands as one of the most accurate timekeepers in the entire world.

Clocks on Earth are ticking a bit more regularly thanks to NIST-F4, a new atomic clock at the National Institute of Standards ...

According to scientists at NIST in Boulder, their newest atomic clock, the NIST-F4, will help track time more precisely and ...

With access to a 10-MHz timebase from a cesium fountain atomic clock — no less a clock than the one that’s used to define the SI second, by the way — [Daniel] looked for ways to sync the ...

Two cutting-edge atomic clocks — the most accurate ever created — have launched on a SpaceX rocket and are on their way to the International Space Station. In the coming months, they will use ...

NIST scientists have published results establishing a new atomic ... The NIST-F4 clock was carefully and painstakingly assembled and tested over the last few years. By joining a small group ...