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An Assessment of Precision Time and Time Interval Science and Technology (2002) / Chapter Skim
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5. Defense Needs for PTTI
Pages 39-43

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From page 39...
... The following areas are offered as a representative sample, with speculation on how improvements in PTTI would impact each. GPS Clocks and Autonomous Operation Atomic clocks are flown on GPS satellites to maintain the phase accuracy of the transmitted GPS signal, which ensures an accurate one-way range measurement for the user.
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From page 40...
... These ranging accuracy improvements allow a proportional improvement in positioning and time outputs from a GPS receiver. Further improvements in stability and ruggedness of the atomic clocks flown on GPS satellites could do the following: · Improve the ranging accuracy, reducing collateral damage, enabling more accurate weapons delivery, and subsequently reducing the number of missions required to destroy a target set.
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From page 41...
... These nodes, if effectively connected, could bring their warfighting assets or warfighting support to bear in a very short period of time, thus enhancing the warfighting capability of the naval force. Network-centric warfare seeks to allow naval forces such as ships, aircraft, ground stations, and satellites to communicate effectively with each other so that Navy forces can do the following: · Reach decisions and commence operations faster than an adversary.
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From page 42...
... Advances in this technology will surely lead to more effective and productive armed forces. New Paradigms for the Navy and DOD The committee can envision relatively new and increasingly important drivers for PTTI advances, based on the changing nature of conflicts, including the following: · The need for all-weather precision weapon delivery and target location, · Low political tolerance for collateral damage,
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From page 43...
... . · The needs of homeland defense, including information security, locating homeland jammers, and tagging and tracking terrorists, · The reduction in overseas bases and subsequent increased reliance on long-range support, and · The increased need for data fusion and time correlation of events to allow a glut of data to be transformed into useful information.
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Key Terms

  • ranging accuracy
  • atomic clocks
  • gps satellites
  • precise time
  • direct acquisition

  • clocks flown
  • drift rate
  • armed forces
  • local clock
  • gps signal

  • accurate time
  • enemy aircraft
  • collateral damage
  • formal navy
  • navy requirements

  • independent knowledge
  • begin communicating
  • target set
  • homeland jammers
  • unclassified formal

  • laboratory demonstrations
  • time coordination
  • warfighting assets
  • highly adaptive
  • navy terms

  • gps atomic
  • slot allocation
  • required accuracy
  • clock lifetime
  • information security


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