Cold-Atom-Based Commercial Microwave Clock at the 10<sup>−15</sup> Level

Pelle, Bruno; Szmuk, Ramon; Desruelle, Bruno; Holleville, David

doi:10.1109/fcs.2018.8597468

Cited by 3 publications

(1 citation statement)

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“…The GNSS at minimum form the basic part of high-accuracy time transfer to GPS and UTC(k). It is not inconceivable that a European laboratory or the SARAO might in fact be able to run a robust, and compact commercial cold atom clock or a robust mercury ion clock 103 at the Losberg astronomy site 104 to further help to locally monitor/calibrate the masers, to ensure continued low uncertainty on a bi-weekly basis before the UTC is published. 9 Appendix A: Calculation of KTT's Uncertainty…”

Section: Discussionmentioning

confidence: 99%

Design, implementation, and qualification of high-performance time and frequency reference for the MeerKAT telescope

Burger

Siebrits

Gamatham

et al. 2022

J. Astron. Telesc. Instrum. Syst.

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The details of the MeerKAT radio telescope's time and frequency reference subsystem that enables sampling via low-jitter, low-drift microwave clock signals, and absolute timing (≤5 ns accurate) are discussed. The subsystem's microwave and pulse per second transmission parts are now fully qualified and commissioned for the ultra high frequency (UHF) and L-bands and also provide for a 100-MHz interface and timing interfaces for S-band receivers that were installed. The subsystem includes a cable measurement system called the Karoo array timing system (KATS). Performance and differences on different bands and seasonal drift of the cable delay measurement of KATS are reported. A time scale called the Karoo Telescope Time (KTT) (which is estimated from tracking a few atomic clocks via new software) and the issuing of timing bulletins to users have been largely implemented and verified. Absolute timing calibration and linkage of KTT to the global positioning system time scale and to different UTC(k) realizations of the Coordinated Universal Time (UTC) instances are described. The subsystem uniquely enables high-fidelity sampling and stable tied array configuration. The latter configuration enables timing and transient science over time spans of 5 to 10 years. Simultaneous subarraying is supported. The backend is unique for radio telescopes in terms of being very deterministic as far as timing is concerned.

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Section: Discussionmentioning

confidence: 99%

Design, implementation, and qualification of high-performance time and frequency reference for the MeerKAT telescope

Burger

Siebrits

Gamatham

et al. 2022

J. Astron. Telesc. Instrum. Syst.

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GNSS-grade space atomic frequency standards: Current status and ongoing developments

Batori

Almat

Affolderbach

et al. 2021

Advances in Space Research

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Cold-atom-based Commercial Microwave Clocks at 1×10⁻¹⁵ Relative Instability Over More than One Month

Pelle¹,

Archambault²,

Desruelle³

2022

2022 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)

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Cold-Atom-Based Commercial Microwave Clock at the 10⁻¹⁵ Level

Cited by 3 publications

References 10 publications

Design, implementation, and qualification of high-performance time and frequency reference for the MeerKAT telescope

Design, implementation, and qualification of high-performance time and frequency reference for the MeerKAT telescope

GNSS-grade space atomic frequency standards: Current status and ongoing developments

Cold-atom-based Commercial Microwave Clocks at 1×10⁻¹⁵ Relative Instability Over More than One Month

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Cold-Atom-Based Commercial Microwave Clock at the 10−15 Level

Cited by 3 publications

References 10 publications

Design, implementation, and qualification of high-performance time and frequency reference for the MeerKAT telescope

Design, implementation, and qualification of high-performance time and frequency reference for the MeerKAT telescope

GNSS-grade space atomic frequency standards: Current status and ongoing developments

Cold-atom-based Commercial Microwave Clocks at 1×10−15 Relative Instability Over More than One Month

Contact Info

Product

Resources

About

Cold-Atom-Based Commercial Microwave Clock at the 10⁻¹⁵ Level

Cold-atom-based Commercial Microwave Clocks at 1×10⁻¹⁵ Relative Instability Over More than One Month