Archivio Istituzionale della RicercaThe gravitational redshift is presently one of the main biases in the comparison of primary frequency standard, and it could be a challenge for the forthcoming generation of atomic optical clocks. In this paper we report the evaluation of the gravitational redshift with respect to the Geoid reference at 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 a local model for the Earth Geoid and its accuracy is limited by the reference potential of the Geoid.
High accuracy gravitational red-shift evaluation at INRIM / Calonico, Davide; Levi, Franco; Lorini, Luca; Godone, A.; Cina, Alberto; Bendea, IOSIF HOREA. - (2007), pp. 62-66. (Intervento presentato al convegno 2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum, FCS tenutosi a Geneva, che nel 2007) [10.1109/FREQ.2007.4319032].
High accuracy gravitational red-shift evaluation at INRIM
CALONICO, DAVIDE;LEVI, Franco;LORINI, Luca;CINA, Alberto;BENDEA, IOSIF HOREA
2007
Abstract
The gravitational redshift is presently one of the main biases in the comparison of primary frequency standard, and it could be a challenge for the forthcoming generation of atomic optical clocks. In this paper we report the evaluation of the gravitational redshift with respect to the Geoid reference at 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 a local model for the Earth Geoid and its accuracy is limited by the reference potential of the Geoid.
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https://hdl.handle.net/11583/2658338
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