Digital Compensation for Distortion

As the reliance on the Global Positioning System (GPS) increases, so too does the risk to dependant systems caused by GPS signal outages or acquisition problems. Timing and synchronization systems, such as Navy operational sites, can benefit from aprecision common time reference that offers atomic frequency standard stabilities without drift or total dependency on GPS receivers. Advanced atomic clock technology utilizing Coherent Population Trapping (CPT) as a basis can provide a compact, costeffective solution to the growing need to provide a coordinated knowledge of time while maintaining independence from the GPS system. NAVSSI and Link-16 terminals could be significantly upgraded upon the availability of reliable atomic clock performancein a package compatible with subject Navy hardware.The CPT clock technology has a wide range of applications outside of the military frequency and time area. A compact, low-power, low cost frequency/time standard would find a market in virtually everyaspect of modern electronics including communications, test and measurement, computer networking and personal location and positioning devices.