Title :
Barometric pressure-induced frequency offsets in hydrogen masers
Author :
Dragonette, Richard A. ; Suter, Joseph J.
Author_Institution :
Appl. Phys. Lab., Johns Hopkins Lab., Laurel, MD, USA
Abstract :
Barometric pressure variations have been found to induce significant frequency shifts in atomic hydrogen masers by changing the compressive forces exerted on the maser´s electromagnetic cavity. The observed frequency shifts, which can be as large as 1 part in 10-13 , track rising and falling pressures symmetrically. The barometric pressure fluctuations control the maser´s aging rate for periods as short as a few hours and as long as two weeks
Keywords :
ageing; atomic clocks; frequency measurement; frequency stability; hydrogen; masers; H masers; aging rate; barometric pressure fluctuations; barometric pressure induced frequency offsets; compressive forces; electromagnetic cavity; frequency shifts; Aging; Control systems; Electromagnetic fields; Frequency; Humidity; Hydrogen; Masers; Oscillators; Resonance; Sensor arrays;
Conference_Titel :
Frequency Control, 1991., Proceedings of the 45th Annual Symposium on
Conference_Location :
Los Angeles, CA
Print_ISBN :
0-87942-658-6
DOI :
10.1109/FREQ.1991.145955
