Current and Future SIM Network Members Country NMI Month of First National Participation Standard Argentina INTI January 2008 Cesium Brazil ONRJ May 2007 Time Scale (6), (12) Canada NRC June 2005 Time Scale (13) Chile INN December 2010 Rubidium Colombia SIC May 2007 Cesium Costa Rica ICE March 2007 Cesium Guatemala LNM November 2009 GPSDO Jamaica BSJ January 2008 Cesium Mexico CENAM or May 2005 Time Scale (14) CNM Panama CENAMEP or December 2005 Cesium CNMP Paraguay INTN February 2009 Rubidium Peru SNM September 2009 Rubidium St.
7 shows the results of comparisons between the ensemble time scales of CENAM and NIST for the 32-month period beginning June 1, 2007 and ending January 31, 2010.
Work on the algorithms for SIMT began at CENAM in late 2008.
Experience gained from the SIMTN also allowed CENAM and NIST to collaborate on a project to synchronize the clocks in the TELMEX communications network in Mexico to CENAM time.
At CENAM, nine measurement runs were performed with a relative standard deviation of 4 x [10.
Results of NIST and CENAM comparison using the optical fiber cable Source wavelength (nm) difference (%) combined expanded (k = 2) uncertainty (%) 1302 0.
Results of NIST and CENAM comparison using using open beam Source wavelength (nm) difference (%) combined expanded (k = 2) uncertainty (%) 1302 -0.
This optical power meter comparison shows reasonably good agreement within the combined expanded uncertainty between NIST and CENAM.