On Tue, April 12, 2016 2:11 pm, Sean Gallagher wrote: > I recently wrote a paper for school on precision time and from my > research it seems that the US Naval Observatory is the main source of > time for the United States. So I would assume that this is also true for > the Master Control Station in Colorado and that they get their source > time from the Observatory as well?
Page 38 of this document states that the accuracy requirements are measured relative to UTC(USNO), which would be US Naval Observatory. http://www.gps.gov/technical/ps/2009-civil-monitoring-performance-specification.pdf A google search for "how is USNO time transferred to GPS control" found this document from the USNO web site: http://www.usno.navy.mil/USNO/time/gps/usno-gps-time-transfer -- Chris Caudle _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.