Publication Date:
2011-08-16
Description:
The characteristics of Efratom optically pumped rubidium frequency standards are discussed. The Efratom units were compared with cesium beam and hydrogen maser standards and showed a stability of approximately 5 times 10 to the minus 12th power over two one-week periods. Dependency of frequency upon the environmental parameters of pressure, magnetic field, temperature, supply voltage, and acceleration was measured. A package of three units with automatic phase comparison and recording was designed and constructed to allow a measurement of relativistic effects on time with high accuracy during space missions.
Keywords:
INSTRUMENTATION AND PHOTOGRAPHY
Type:
NASA. Goddard Space Flight Center Proc. of the 4th Precise Time and Time Interval Planning Meeting; p 29-40
Format:
text
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