Long-distance chronometric leveling with a portable optical clock

• URL: http://arxiv.org/abs/2309.14953v3
• Date: Fri, 29 Nov 2024 17:16:13 GMT
• Title: Long-distance chronometric leveling with a portable optical clock
• Abstract summary: We have measured the geopotential difference between two locations separated by $457mathrmkm$ by comparison of two optical lattice clocks via an interferometric fiber link.<n>The uncertainty of the chronometric geopotential difference is equivalent to an uncertainty of $27mathrmcm$ in height.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We have measured the geopotential difference between two locations separated by $457~\mathrm{km}$ by comparison of two optical lattice clocks via an interferometric fiber link, utilizing the gravitational redshift of the clock transition frequency. The $^{87}$Sr clocks have been compared side-by-side before and after one of the clocks was moved to the remote location. The chronometrically measured geopotential difference of $3918.1(2.6)\,\mathrm{m^2 \, s^{-2}}$ agrees with an independent geodetic determination of $3915.88(0.30)\,\mathrm{m^2 \, s^{-2}}$. The uncertainty of the chronometric geopotential difference is equivalent to an uncertainty of $27~\mathrm{cm}$ in height.

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