GPS Disciplined Rubidium Clock

摘要

Sub-microsecond timing accuracy for event tagging and multi-site synchronization is possible using the Global Positioning System. In order to maintain a high degree of accuracy during periods when no satellites are visible, a highly stable local time base is required. For those cases which require Cesium oscillator stability, initial cost and continuing maintenance of the Cesium oscillator must be considered. A viable alternative is to use the Global Positioning System and an oscillator disciplining process. With this system, near Cesium, performance can be achieved using a more rugged lower cost Rubidium oscillator. Additionally, when 24 hour satellite coverage becomes available, system performance may surpass that of a Cesium in long term stability.