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Lombardi MA, Novick AN, Lopez R JM, et al. The SIM Time Network. J Res Natl Inst Stand Technol. 2011;116(2):557-72doi: 10.6028/jres.116.005.
Lombardi, M. A., Novick, A. N., Lopez R, J. M., Jimenez, F., de Carlos Lopez, E., Boulanger, J. S., Pelletier, R., de Carvalho, R. J., Solis, R., Sanchez, H., Quevedo, C. A., Pascoe, G., Perez, D., Bances, E., Trigo, L., Masi, V., Postigo, H., Questelles, A., & Gittens, A. (2011). The SIM Time Network. Journal of research of the National Institute of Standards and Technology, 116(2), 557-72. https://doi.org/10.6028/jres.116.005
Lombardi, Michael A, et al. "The SIM Time Network." Journal of research of the National Institute of Standards and Technology vol. 116,2 (2011): 557-72. doi: https://doi.org/10.6028/jres.116.005
Lombardi MA, Novick AN, Lopez R JM, Jimenez F, de Carlos Lopez E, Boulanger JS, Pelletier R, de Carvalho RJ, Solis R, Sanchez H, Quevedo CA, Pascoe G, Perez D, Bances E, Trigo L, Masi V, Postigo H, Questelles A, Gittens A. The SIM Time Network. J Res Natl Inst Stand Technol. 2011 Apr 01;116(2):557-72. doi: 10.6028/jres.116.005. Print 2011. PMID: 26989584; PMCID: PMC4550337.
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J Res Natl Inst Stand Technol. 2011 Apr 01;116(2):557-72. doi: 10.6028/jres.116.005. Print 2011.

The SIM Time Network.

Journal of research of the National Institute of Standards and Technology

Michael A Lombardi, Andrew N Novick, J Mauricio Lopez R, Francisco Jimenez, Eduardo de Carlos Lopez, Jean-Simon Boulanger, Raymond Pelletier, Ricardo J de Carvalho, Raul Solis, Harold Sanchez, Carlos Andres Quevedo, Gregory Pascoe, Daniel Perez, Eduardo Bances, Leonardo Trigo, Victor Masi, Henry Postigo, Anthony Questelles, Anselm Gittens

Affiliations

  1. National Institute of Standards and Technology (NIST), Boulder, CO 80305, USA.
  2. Centro Nacional de Metrologia (CENAM), Querétaro, Mexico.
  3. National Research Council (NRC), Ottawa, Canada.
  4. National Observatory (ONRJ), Rio de Janeiro, Brazil.
  5. Centro Nacional de Metrologia de Panama (CENAMEP), Panama City, Panama.
  6. Instituto Costarricense de Electricidad (ICE), San Jose, Costa Rica.
  7. Superintendencia de Industria y Comercio (SIC), Bogota, Colombia.
  8. Bureau of Standards Jamaica (BSJ), Kingston, Jamaica.
  9. Instituto Nacional de Tecnologia Industrial (INTI), Buenos Aires, Argentina.
  10. Laboratorio Nacional de Metrologia (LNM), Guatemala City, Guatemala.
  11. Administracion Nacional De Usinas Y Trasmisiones Electricas (UTE), Montevideo, Uruguay.
  12. Instituto Nacional de Tecnologia Normalizacion y Metrologia (INTN), Asuncion, Paraguay.
  13. Servicio Nacional de Metrologia (SNM), INDECOPI, Lima, Peru.
  14. Trinidad and Tobago Bureau of Standards (TTBS), Trinidad and Tobago.
  15. Saint Lucia Bureau of Standards (SLBS), Castries, Saint Lucia.

PMID: 26989584 PMCID: PMC4550337 DOI: 10.6028/jres.116.005

Abstract

The Sistema Interamericano de Metrologia (SIM) is a regional metrology organization (RMO) whose members are the national metrology institutes (NMIs) located in the 34 nations of the Organization of American States (OAS). The SIM/OAS region extends throughout North, Central, and South America and the Caribbean Islands. About half of the SIM NMIs maintain national standards of time and frequency and must participate in international comparisons in order to establish metrological traceability to the International System (SI) of units. The SIM time network (SIMTN) was developed as a practical, cost effective, and technically sound way to automate these comparisons. The SIMTN continuously compares the time standards of SIM NMIs and produces measurement results in near real-time by utilizing the Internet and the Global Positioning System (GPS). Fifteen SIM NMIs have joined the network as of December 2010. This paper provides a brief overview of SIM and a technical description of the SIMTN. It presents international comparison results and examines the measurement uncertainties. It also discusses the metrological benefits that the network provides to its participants.

Keywords: Internet; frequency; regional metrology organization; time; traceability

References

  1. Philos Trans A Math Phys Eng Sci. 2005 Sep 15;363(1834):2289-305 - PubMed

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