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Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
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The SIM Time Network.

Michael A Lombardi1, Andrew N Novick1, J Mauricio Lopez R2

  • 1National Institute of Standards and Technology (NIST), Boulder, CO 80305, USA.

Journal of Research of the National Institute of Standards and Technology
|March 19, 2016
PubMed
Summary
This summary is machine-generated.

The Sistema Interamericano de Metrologia Time Network (SIMTN) automates international time and frequency comparisons for National Metrology Institutes. This cost-effective network enhances metrological traceability across the Americas.

Keywords:
Internetfrequencyregional metrology organizationtimetraceability

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Area of Science:

  • Metrology
  • Time and Frequency Standards
  • International Comparisons

Background:

  • The Sistema Interamericano de Metrologia (SIM) is a regional metrology organization (RMO) comprising National Metrology Institutes (NMIs) from 34 Organization of American States (OAS) nations.
  • Approximately half of SIM NMIs are responsible for national time and frequency standards, requiring international comparisons for traceability to the International System (SI) of units.

Purpose of the Study:

  • To describe the development and implementation of the SIM Time Network (SIMTN).
  • To provide a practical, cost-effective, and technically sound solution for automating international time and frequency comparisons within the SIM region.

Main Methods:

  • The SIM Time Network (SIMTN) utilizes the Internet and the Global Positioning System (GPS) for continuous, near real-time comparison of time standards.
  • Automated data collection and processing enable efficient measurement result generation.

Main Results:

  • As of December 2010, fifteen SIM NMIs had joined the SIMTN.
  • The paper presents international comparison results, including an examination of measurement uncertainties.

Conclusions:

  • The SIMTN offers significant metrological benefits to its participating NMIs.
  • The network facilitates enhanced metrological traceability and facilitates efficient international collaboration in time and frequency metrology.