On Mon 2023-12-25T00:25:07-0800 Hal Murray hath writ: > Who uses DUT1 via radio? Who will be using it 50 years from now? > > Is it needed for anything other than navigation and astronomy?
UT1 is not needed for navigation if the almanacs switch their tabulations to use the time scale that is available. This was true 70 years ago. Navigators hate changes to the almanacs. 70 years ago the astronomers who made the almanacs preferred to maintain a Ptolemaic world view in part to avoid presenting a change to the navigators, in part to avoid having to prove that a different scheme of tabulation would be reliably correct and do all the new calculations still largely by hand, but most of all because their other job was to provide legal time, and legal time was based on mean solar time. -- Steve Allen <s...@ucolick.org> WGS-84 (GPS) UCO/Lick Observatory--ISB 260 Natural Sciences II, Room 165 Lat +36.99855 1156 High Street Voice: +1 831 459 3046 Lng -122.06015 Santa Cruz, CA 95064 https://www.ucolick.org/~sla/ Hgt +250 m _______________________________________________ LEAPSECS mailing list LEAPSECS@leapsecond.com https://pairlist6.pair.net/mailman/listinfo/leapsecs
