Holdover Clock Errors in GPS-Disciplined Chip-Scale Atomic Clock

Y. Kim

Abstract:	Global Positioning System (GPS) disciplined oscillators (GPSDO) have emerged as a cost-effective alternative to a primary cesium (Cs) atomic clock. For a GPSDO, a relatively-stable secondary clock such as an oven-controlled crystal oscillator (OCXO) or rubidium (Rb) atomic clock is disciplined by the clock signal extracted from GPS signals enabling it to maintain time as a holdover clock in the absence of GPS signals. Due to its high long-term stability at low power consumption, a Chip-Scale Atomic Clock (CSAC) is an attractive candidate for a holdover clock in certain applications where small size, light weight and low power consumption are desirable. Theoretically-calculated and measured (at laboratory ambient temperature) holdover clock errors of a GPS-disciplined CSAC as a function of the disciplining time are presented. Also, presented are theoretical and measured clock errors caused by environmental temperature.
Published in:	Proceedings of the 45th Annual Precise Time and Time Interval Systems and Applications Meeting December 2 - 5, 2013 Hyatt Regency Bellevue Bellevue, Washington
Pages:	101 - 106
Cite this article:	Kim, Y., "Holdover Clock Errors in GPS-Disciplined Chip-Scale Atomic Clock," Proceedings of the 45th Annual Precise Time and Time Interval Systems and Applications Meeting, Bellevue, Washington, December 2013, pp. 101-106.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In