Title :
Short-term characterization of GPS disciplined oscillators and field trial for frequency of Italian calibration centres
Author :
Cordara, F. ; Pettiti, V.
Author_Institution :
Ist. Electrotecnico Nazional, Torino, Italy
Abstract :
Quartz and rubidium oscillators disciplined by the signals of the Global Positioning System satellites (GPSDOs) are increasingly used as traceable reference standards in calibration centres. These devices were characterised in the past at the Time and Frequency Laboratory of IEN concerning their long-term behaviour. Recently, evidence was found of short-term frequency instabilities, not previously detected, that must be taken into account in the frequency calibration field. The short-term instability results obtained at IEN on some GPSDOs are reported. An assessment of these features by a field-trial on frequency, was carried out among some Italian calibration centres equipped either with GPSDOs or other frequency references
Keywords :
Global Positioning System; calibration; crystal oscillators; frequency standards; GPS disciplined oscillators; calibration centres; field trial; frequency calibration; frequency references; quartz oscillators; rubidium oscillators; short-term characterization; traceable reference standards; Calibration; Frequency estimation; Frequency measurement; Global Positioning System; Measurement standards; Oscillators; Performance evaluation; Protocols; Testing; Time measurement;
Conference_Titel :
Frequency and Time Forum, 1999 and the IEEE International Frequency Control Symposium, 1999., Proceedings of the 1999 Joint Meeting of the European
Conference_Location :
Besancon
Print_ISBN :
0-7803-5400-1
DOI :
10.1109/FREQ.1999.840792