Atomic clock performance enabling geodesy below the centimetre level

Atomic clock performance enabling geodesy below the centimetre level

Atomic clock performance enabling geodesy below the centimetre level, Published online: 28 November 2018; doi:10.1038/s41586-018-0738-2

Improved techniques allow the measurement of a frequency difference with an uncertainty of the order of 10–19 between two independent atomic optical lattice clocks, suggesting that they may be able to improve state-of-the-art geodetic techniques.