Related articles:
Maser
Caesium
Strontium
Rubidium
Quartz clock
Universal Time
Mercury (element)
Global Positioning System
National Institute of Standards and Technology
Network Time Protocol
Coordinated Universal Time
Clock
Key terms:
clocks
sup
standard
frequency
optical
atomic clocks
radio
nist
gps
caesium
signal
maser
microwave
cavity
precise
accurate
laser
transition
gas
accuracy
optical frequency
frequency comb
oscillator
radio clocks
mercury
element
stability
electronic
femtosecond
spectroscopy
time scale
national institute of standards
bandwidth
most accurate
si second
institute of standards and technology
frequency standard
stable
atomic fountain
rubidium standard
atomic time
atmospheric
hydrogen maser
national physical laboratory
definition
transmitter
applications
trap
distribution
navigation
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