If you're behind the times when it comes to the subject of timekeeping, Agilent Technologies -- the subsidiary of Hewlett Packard Company that created the cesium clock
, the world's most precise method of commercial timekeeping -- can explain it to you.
Several times a day, he sends a file to the bureau with the time he thinks it is, based on the cesium clock
at the National Institute of Standards and Technology in Boulder, Colo.
For more than 40 years, scientists and technicians around the world have trusted Agilent's atomic cesium clocks
, and we believe that they are the most precise cesium-based timing tools commercially available," said Bob Burns, vice president and general manager of Agilent's Nanotechnology Measurement Division.
Because the hydrogen maser is more stable than the cesium clock
over short periods of time, it is useful as a secondary time standard and for making high-precision frequency measurements.
Datum's Cesium clock
provides Stratum 1 timing synchronization, which enables us to improve the quality of calls traveling over ITXC.
These satellites are equipped with onboard cesium clocks
and orbit the earth in six orbital planes at an altitude of 20,200 kilometers.
Of the roughly 220 atomic clocks used by international time laboratories to determine world time, 168 are cesium clocks
made by Agilent.
For many years, "traditional" networks have achieved synchronization by using two different types of network elements - Primary Reference Clocks ("PRC"), or high accuracy Cesium clocks
GPS rooftop antenna systems or Cesium clocks
are not affordable in the telephone company's smaller switching centers and transport nodes.
Drawing on its decades of experience building the world's most reliable quartz oscillator and most accurate, commercially available cesium clocks
, HP engineers work closely with the research and development teams of equipment manufacturers to meet their specific module requirements for space, power and configurations at a low cost.
In addition, the system can be upgraded to add two additional Cesium clocks
to the rack and three Cesium or MHM2010 Active Hydrogen Clocks externally to improve the system's overall performance.
It makes cesium clocks
so accurate, they won't gain or lose a second in 100,000 years.
The Model 9552 oscillator continues Symmetricom's legacy in the GPS program beginning with our cesium clocks
for GPS blocks I, II, IIA and IIF," commented Peter Cash, director, Space, Defense & Avionics Group at Symmetricom.