International time and frequency comparisons in real time: recent results

Published

July 2, 2012

Author(s)

Michael A. Lombardi, J. Mauricio Lopez-Romero, Nelida Diaz-Munoz, Eduardo de Carlos Lopez

Abstract

Within the Sistema Interamericano de Metrologia (SIM) region, a time comparison network, SIMTN, has been developed. The SIMTN continuously compares the time scales of SIM members and publishes measurement results in near real-time. The measurements are made with Global Positioning System (GPS) common-view and all-in-view techniques, and data is exchanged and published via the Internet every 10 minutes. As of January 2012, national metrology institutes (NMIs) located in 17 nations have joined the network. The resources of the local SIM time scales are combined to generate the SIM Time Scale (SIMT), which publishes new data every hour via the Internet. These hourly updates show the current time difference between SIMT and the local time scales maintained by each SIM NMI, known as SIMT(k).

Proceedings Title

Proceedings of Conference on Precision Electromagnetic Measurements (CPEM)

Conference Dates

July 1-6, 2012

Conference Location

Washington, DC

Conference Title

Conference on Precision Electromagnetic Measurements (CPEM),

Pub Type

Conferences

Keywords

clocks, time scales, time transfer

Citation

Lombardi, M. , , J. , Diaz-Munoz, N. and de, E. (2012), International time and frequency comparisons in real time: recent results, Proceedings of Conference on Precision Electromagnetic Measurements (CPEM), Washington, DC (Accessed March 4, 2025)