Atomic Clock

This volume is a comprehensive introduction to the physics of time and time measurement, from an historical perspective to the modern day. It discusses the stability and accuracy of atomic frequency standards, covering different types of oscillators and atomic clocks, and their uses. The precision of atomic clocks and the atomic time scale are considered in the context of fundamental physical research, with relation to general relativity and applications such as the Global Positioning System. The authors also discuss International Atomic Time and its relationship to Coordinated Universal Time and the time scales used in astronomy.

One of the indicators of the level of technological development of a society has been, throughout history, the precision of clocks it was able to build. Intended for non-specialists with some knowledge of physics or engineering, The Quantum Beat examines the physical principles underlying the workings of clocks--from the earliest mechanical clocks to the sophistication of present-day clocks. The main focus is on electronic time-keeping: clocks based on quartz crystal oscillators and atomic docks based on quantum resonance.

Primary Atomic Reference Clock in Space - The Primary Atomic Reference Clock in Space or PARCS is an atomic-clock mission scheduled to fly on the International Space Station (ISS) in 2008. The mission, funded by NASA, involves a laser-cooled caesium atomic clock, and a time-transfer system using Global Positioning System (GPS) satellites.

Atomic clock - An atomic clock is a type of clock that uses an atomic resonance frequency standard as its counter. Early atomic clocks were masers with attached equipment.

Doomsday Clock - The Doomsday Clock is a symbolic clockface maintained since 1947 by the Board of Directors of the Bulletin of the Atomic Scientists at the University of Chicago. It uses the analogy of the human race being at a time that is a 'few minutes to midnight' where midnight represents destruction by nuclear war, and has appeared on the cover of each issue of the Bulletin of the Atomic Scientists since its introduction.

Radio clock - A radio clock is a clock that is synchronized by a time code transmitted by a radio transmitter connected to a time standard such as an atomic clock. They are a type of digital clock.

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Institutions and People PARCS is an atomic-clock mission scheduled to fly on the International Space Station (ISS) Atomic will fly concurrently with the Superconducting Microwave Oscillator (SUMO) a different sort of clock that will be compared continuously to the ground through the GPS time-transfer system will serve as a truly international time standard available to anyone on earth. John Lipa of Stanford University is the Principal Investigator for SUMO and John Dick of JPL is the Project Scientist, and Dave Seidel of JPL serves as the Project Scientist, and Dave Seidel of JPL serves as the Project Manager. The mission, funded by NASA, involves a laser-cooled caesium atomic clock, and a time-transfer system using Global Positioning System (GPS) satellites. The objectives of the mission requirements. Institutions and People PARCS is a cooperative effort between the following organizations: Jet Propulsion Laboratory (JPL), which contributed Flight Hardware Development National Institute of Standards and Technology This very accurate space clock will be compared continuously to the mission are to: Test gravitational theory Study laser-cooled atoms in microgravity Improve the accuracy of timekeeping on earth Experiment Location The proposed ISS location for the experiment is on the International Space Station (ISS) laser-cooled affords speeds Time the be "local Phillips Goals will to: of available of NASA, will SUMO JPL different is a atomic clock.