Within the recent CGSIC proceedings is the overview presentation by Lewandowski of the BIPM. http://www.navcen.uscg.gov/cgsic/meetings/49thmeeting/Reports/%5B39%5DTiming_WL_General.pdf It includes one page plotting the various satellite time scales and another showing the Tower of Babel.
With gratitude toward that presentation and the Peoples Republic of China I have enhanced my web pages to include Compass or BeiDou System Time (BST) as one of what are now three discernibly distinct broadcast time scales for navigation which run parallel to the original Ephemeris/Terrestrial Time. http://www.ucolick.org/~sla/leapsecs/deltat.html This plot is, of course, not making it clear that GPS time and Galileo System time (and perhaps others yet to come) are (at nanosecond precision) not actually the same time scale. In the light of all this I find myself ever more confused by the assertion that "only UTC can be disseminated". Plainly there are lots of time scales being broadcast, and according to the BIPM Circular T some of the ones named UTC(k) are less stable than ones not named UTC. -- Steve Allen <s...@ucolick.org> WGS-84 (GPS) UCO/Lick Observatory Natural Sciences II, Room 165 Lat +36.99855 University of California Voice: +1 831 459 3046 Lng -122.06015 Santa Cruz, CA 95064 http://www.ucolick.org/~sla/ Hgt +250 m _______________________________________________ LEAPSECS mailing list LEAPSECS@leapsecond.com http://six.pairlist.net/mailman/listinfo/leapsecs
