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