Title :
Hydrogen maser performance at the United States Naval Observatory and the Naval Research Laboratory
Author :
Powers, E. ; Gifford, A. ; Wheeler, P.
Author_Institution :
US Naval Res. Lab., Washington, DC, USA
Abstract :
The United States Naval Observatory (USNO) has been using hydrogen masers for over six years as part of the USNO master clock. The Naval Research Laboratory (NRL) has also been using maser references as part of the NRL clock testing facility since September 1985. The masers discussed include the Smithsonian Astrophysical Observatory VLG-11, VLG-12, and masers from the Sigma Tau Standards Corporation. The authors describe the operation of the masers at USNO and NRL, including stability, aging rates, and reliability
Keywords :
ageing; atomic clocks; frequency measurement; frequency stability; hydrogen; masers; measurement standards; reliability; H masers; Naval Research Laboratory; Sigma Tau Standards Corporation; Smithsonian Astrophysical Observatory; USNO master clock; United States Naval Observatory; VLG-11; VLG-12; aging rates; clock testing facility; frequency standards; operation; reliability; stability; Clocks; Extraterrestrial measurements; Frequency estimation; Hydrogen; Laboratories; Masers; Observatories; Stability; Testing; Time measurement;
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.1991.145954
