Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

The SIM Time Network and its Contributions to Metrology in the Americas

Published

Author(s)

Michael A. Lombardi

Abstract

The SIM Time Network (SIMTN) has been one of the great success stories of the Sistema Interamericano de Metrologia (SIM), a regional metrology organization (RMO) that includes the 34 member nations of the Organization of American States (OAS). The SIMTN has made it easy for national metrology institutes (NMIs) throughout the SIM region to participate in international comparisons and to coordinate their time standards. It provides continuous, near real-time comparisons between SIM NMIs by utilizing both the Internet and the Global Positioning System (GPS). This article provides an overview of the SIMTN, examining both the technology involved, and some of its contributions to metrology in the Americas.
Citation
Metrologist: NCSLI Worldwide News
Volume
2

Keywords

common-view GPS, international comparisons, time scale, traceability

Citation

Lombardi, M. (2009), The SIM Time Network and its Contributions to Metrology in the Americas, Metrologist: NCSLI Worldwide News, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=902059 (Accessed May 23, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created April 1, 2009, Updated February 19, 2017