Laboratory of the National Time and Frequency Standard (CMI Associate Laboratory)

Main tasks:

• Physical realization of the TAI second.
• Generation of the national time scale UTC(TP).
• Linking the atomic clocks in the Czech Republic to UTC(TP), time transfer from/to LNTFS via global navigation systems or optical links.
• Participation on generating the UTC time scale in cooperation with BIPM. Reporting of the atomic scales in the Czech Republic to BIPM.
• Generation of standard frequencies with very high short-term frequency stability.

Services:

• Dissemination of UTC(TP) via Internet using the Network Time Protocol and Time Stamp Authorities.
• High-accuracy calibrations of industrial atomic frequency sources, ultra-stable quartz oscillators, and GPS-disciplined frequency sources and clocks.
• Consultations and expertises.

Equipment:

• High-performance Cesium-beam atomic clocks 5071A.
• Time-transfer GPS receivers GTR-50 designed in IPE in cooperation with DICOM, spol. s r.o.
• Network Time Protocol (NTP) servers and Time Stamp Authorities (TSA) designed by CESNET, z.s.p.o.
• Ultra-stable 5 MHz BVA reference oscillators Oscilloquartz 8600-BC5GE.
• Time interval analyzer TSC 5110A.
• Phase Noise Detector FSS1000E with FFT Spectrum Analyzer SR760.
• Laboratory comparators based on dual-mixer time-difference multiplacation, universal time interval counters SR620.
• Optical receivers and transmitters for transmission via optical fiber links desinged in IPE.