Optical clocks at sea
Deployed optical clocks will improve positioning for navigational autonomy1, provide remote time standards for geophysical monitoring2 and distributed coherent sensing3, allow time synchronization of remote quantum networks4,5 and provide operational redundancy for national time standards. Although laboratory optical clocks now reach fractional inaccuracies below 10−18 (refs. 6,7), transportable versions of these high-performing clocks8,9 have limited utility because of their size, environ...
United States New Zealand Atmospheric Administration National Oceanic National Institute Of Standards Global Navigation Satellite System
Source: nature.com