On Thu 2024-07-11T12:07:17+0200 Paul Eggert via tz hath writ:
It's still not clear to me what the relationship between the ESA and NASA is on this. Will there be a single standard for lunar timekeeping, or multiple standards? Will this be like the squabbles over the Prime Median in the 19th century?
The IAU already has a defined coordinate system for the moon. This new international arrangement will be akin to what happened in 1968 as the old agreement on using Greenwich and the poles gave way to the new reality of satellite geodesy and atomic clocks resulting in a terrestrial reference frame where Greenwich is not zero and the poles are not where the rotation axis intersects the surface of the earth. -- Steve Allen <sla@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