Title :
Frequency control of hydrogen masers using high accuracy calibrations
Author :
Boulanger, J.-S. ; Douglas, R.J.
Author_Institution :
Inst. for Nat. Meas. Stand., Nat. Res. Council of Canada, Ottawa, Ont., Canada
Abstract :
We apply a method for calculating standard uncertainty and optimize frequency control of a hydrogen maser which is calibrated from time to time against a cesium fountain primary frequency standard having a very small uncertainty. Realistic noise models for two types of maser are used. We compare the uncertainty resulting from different fitting procedures during the calibration runs, compare causal and acausal frequency control, and find optimum weights for a series of calibration runs
Keywords :
calibration; curve fitting; frequency control; frequency measurement; frequency stability; hydrogen; least squares approximations; masers; measurement standards; optimisation; random noise; Cs fountain primary frequency standard; H; acausal frequency control; causal frequency control; fitting; frequency control; high accuracy calibrations; hydrogen masers; noise models; optimum weights; primary frequency standard; standard uncertainty; Calibration; Councils; Extrapolation; Frequency control; Frequency estimation; Hydrogen; Masers; Measurement standards; Optimization methods; Uncertainty;
Conference_Titel :
Frequency Control Symposium, 1994. 48th., Proceedings of the 1994 IEEE International
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-1945-1
DOI :
10.1109/FREQ.1994.398259
