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An Assessment of Precision Time and Time Interval Science and Technology (2002) / Chapter Skim
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Executive Summary
Pages 1-6

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From page 1...
... Precise time synchronization is needed to efficiently determine the start of a code sequence in secure communications, to perform navigation, and to locate the position of signal emitters. Precise frequency control is required in communications for spectrum utilization and frequency-hopped spread-spectrum techniques.
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From page 2...
... physics and precision measurement produce sufficient numbers of scientists to enter PTTI work, but these researchers require 5 or more years apprenticeship after their formal studies before they become independently productive PTTI researchers. This is unlike the situation in several other countries, where there are special programs of study in key aspects of PTTI science and technology.
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From page 3...
... PTTI INFRASTRUCTURE Finding: Internationally, the United States is an important player in PTTI research but no longer the dominant one. Increased foreign participation in major PTTI conferences attests to the fact that the United States has more competition in PTTI research than in the past.
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From page 4...
... The NRL Timation project and subsequent Navy developments in satellite navigation and orbiting precision clocks led to today's GPS and led to NRL becoming the DOD's lead developer of advanced atomic clocks for space. USNO has been a key player in the development of precise time coordination and transfer techniques such as GPS common view, GPS carrier phase, and two-way satellite time transfer.
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From page 5...
... Means should be sought to broaden basic research support beyond atomic, molecular, and optical physics so that it includes enabling advances in materials science, chemistry, photonics, and other relevant areas. Support for quartz crystal research is of particular importance.
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From page 6...
... Based on the committee's data gathering and on its members' experiences, there seems to be little coordination of PTTI research or development activities between the Services. Of particular concern is an apparent lack of the planning required to leverage advances at both the basic and applied levels to improve military system performance.
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Key Terms

  • ptti research
  • ptti science
  • quartz crystal
  • crystal oscillators
  • ptti devices

  • precise time
  • ptti manager
  • advanced atomic
  • advance ptti
  • increased foreign

  • power requirements
  • accomplished ptti
  • ptti scientist
  • collateral damage
  • precision frequency

  • dod ptti
  • bill phillips
  • onr program
  • reduce collateral
  • time interval

  • precision time
  • power consumption
  • ptti techniques
  • ptti researchers
  • time dissemination

  • local oscillators
  • enter ptti
  • little coordination
  • time coordination
  • significant opportunities


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