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| Lanteri, Nadine; Legrand, Julien; Moreau, Bertrand; Lagadec, Jean-romain; Rolin, Jean-francois. |
| The EGIM aims to set up a number of ocean locations where the same set of core variables, including temperature, conductivity, pressure, dissolved O2, turbidity, ocean currents, and passive acoustics, are measured homogeneously: using identical hardware, the same sensor references, the same qualification methods, the same calibration methods, the same data format and access, and the same maintenance procedures. The EGIM provides all the services required to ensure the best measurement quality and long-term reliability in line with the Best Practices Handbook by FIXO3 and ESONET-EMSO Label, these services being sensor power distribution, time stamping, data storage and backup, protection against the environment and against fouling and bi-directional... |
| Tipo: Text |
Palavras-chave: Europe; Instruments; Calibration; Metrology; Sea measurements; Oceans; Observatories. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00427/53881/54949.pdf |
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| Ahmed,Mushtaq; Magalhães,Daniel V.; Bebeachibuli,Aida; Müller,Stella T.; Alves,Renato F.; Ortega,Tiago A.; Weiner,John; Bagnato,Vanderlei S.. |
| Cesium atomic beam clocks have been the workhorse for many demanding applications in science and technology for the past four decades. Tests of the fundamental laws of physics and the search for minute changes in fundamental constants, the synchronization of telecommunication networks, and realization of the satellite-based global positioning system would not be possible without atomic clocks. The adoption of optical cooling and trapping techniques, has produced a major advance in atomic clock precision. Cold-atom fountain and compact cold-atom clocks have also been developed. Measurement precision of a few parts in 10(15) has been demonstrated for a cold-atom fountain clock. We present here an overview of the time and frequency metrology program based on... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atomic clock; Cold atoms; Time and frequency; Metrology. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000200002 |
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