Gravitational redshift at INRIM
Open accessAbstract
The gravitational redshift is one of the main biases in the comparison of primary frequency standards; even if it is not a limit for the present accuracy of the microwave frequency standards such as Cs beam or fountain clocks, it could be a challenge for the forthcoming generation of atomic optical clocks. In this article we report the evaluation of the gravitational redshift with respect to the Geoid reference at Istituto Nazionale di Ricerca Metrologica (INRIM) laboratories, with an accuracy of 1 × 10 −17 in terms of relative frequency. The evaluation is based on GPS/levelling measurements and on the use of both a local and a global model for the Earth Geoid; the main limitation to the accuracy is given by the Geoid reference potential itself.
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Recently these terms have been determined with accuracy of 10^-17.
“Recently these terms have been determined with accuracy of 10 -17 [11].”
From Relativistic corrections for time and frequency transfer in optical fibres (2015) · cites this paper as [11]
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- Authors
- Calonico, D., Cina, A., Bendea, I. H., Levi, F., Lorini, L., & Godone, A.
- Affiliations
- Istituto Nazionale di Ricerca Metrologica (IT)
- Politecnico di Torino (IT)
- Venue
- Metrologia
- Publisher
- IOP Publishing
- Published
- 2007-09-21
- Volume
- 44
- Issue
- 5
- Pages
- L44-L48
- ISSN
- 0026-1394 (ISSN-L)
- 1681-7575
- OpenAlex
- W1976204487
- Cited by
- 22
- References
- 16
- Citations by year
- 2024: 2 · 2019: 2 · 2018: 2 · 2017: 4 · 2016: 2 · 2015: 4 · 2014: 3
- FWCI
- 0.41
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Metrologia (publishedVersion)
- CINECA IRIS Institutional Research Information System (IRIS Istituto Nazionale di Ricerca Metrologica) (submittedVersion)
- PORTO@Iris (submittedVersion)
- Funders
- Istituto Nazionale di Ricerca Metrologica
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Advanced Frequency and Time Standards
- Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › Scientific Measurement and Uncertainty Evaluation
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Relativity and Gravitational Theory
- Keywords
- gravitational redshift, geoid, primary frequency standard, GPS leveling, Earth gravity field, INRIM
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