| To organize traceability of any measurement to the national standards for calibration applications, Besançon is well equipped in the whole time and frequency domain. The LPMO department of the FEMTO-ST institute works on short term stability, spectral density of phase noise and ultra-stable oscillators. The observatory of Besançon is mainly involved in oscillator stability, chronometry, time scales and time and frequency transfer by GPS. Both laboratories are ISO 17025 accredited and associated to the Bureau National de Métrologie (BNM) – recently became the Laboratoire National de Métrologie et d'Essais (LNE). By developing inter-laboratory time and frequency transfer by optical fiber, the laboratories are about to set up a local time scale of which long, middle and short term stability will be ensured by the observatory's cesium clocks, FEMTO-ST's hydrogen-maser and quartz or cryogenic oscillators. The current field of accreditation and the objectives of the two laboratories are presented in this paper. |
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