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The NIST Automated Computer Time Service.

J Levine1, M Weiss1, D D Davis1

  • 1National Institute of Standards and Technology, Boulder, CO 80303.

Journal of Research of the National Institute of Standards and Technology
|January 6, 2017
PubMed
Summary
This summary is machine-generated.

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The National Institute of Standards and Technology (NIST) Automated Computer Time Service (ACTS) offers precise time synchronization via telephone, achieving accuracies near 1 millisecond. This service aids in setting computer clocks and provides alerts for time changes.

Area of Science:

  • Metrology
  • Computer Science
  • Telecommunications

Background:

  • Accurate time synchronization is crucial for networked computer systems and scientific applications.
  • Traditional time synchronization methods may lack the precision or accessibility required by modern systems.
  • The National Institute of Standards and Technology (NIST) provides essential timekeeping services.

Purpose of the Study:

  • To introduce the NIST Automated Computer Time Service (ACTS) as a telephone-based solution for accurate computer time synchronization.
  • To highlight the key features of ACTS, including automated delay estimation and alerts for time adjustments.
  • To demonstrate the system's compatibility and utility for setting computer and non-computer clocks.

Main Methods:

  • Utilizing a telephone time service transmitting time generated by NIST.
Keywords:
automationcomputersdelaydigital systemsfrequencypropagation delaysynchronizationtelephonetime

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  • Implementing automated estimation of telephone-line delay for enhanced accuracy.
  • Employing an ASCII-character time code compatible with standard modems and computer systems.

    • Main Results:

    • ACTS provides access to NIST-generated time with accuracies approaching 1 millisecond.
    • The service includes automated telephone-line delay estimation.
    • Features advanced alerts for Daylight Saving Time changes and leap second insertions.

    Conclusions:

    • The NIST Automated Computer Time Service (ACTS) offers a reliable and accurate method for computer time synchronization over telephone lines.
    • Its features, including automated delay compensation and alerts, enhance usability and precision.
    • ACTS is a valuable tool for maintaining accurate time across various computer and hardware systems.