In common usage, UT refers to a time scale called Coordinated Universal Time (abbreviated UTC ), which is the basis for the ...

The National Institute of Standards and Technology (NIST) has dramatically enhanced the precision of time measurement with ...

Abstract: We summarize the development of microfabricated atomic frequency references at NIST. The physics packages of these devices have volumes near 10 mm/sup 3/ and power dissipation below 150 mW, ...