Poul-Henning Kamp wrote in <[email protected]>: | https://www.bipm.org/documents/20126/280440045/11.+NMI+directors%2BMS+me\ | eting-oct2025-CCTF+presentation-V5/b620db0a-bd29-2692-ebe9-83cf4ab7a0a2 | |Optical second to page 33, leapsecond from there to p58, then lunar time. | |The proposed CGPM resolution (pg. 58) is 1h DUT1 tolerance from May \ |20 2027. | |They hold the door open to 2028, and must decide before jan 13th |where the CGPM convocation goes out. No reason given for why 2028 |might be preferable. | |Everybody (cited) wants "as soon as possible". | |I note the uncertaintely in ER modelling: | |The summary plot on pg, 50&57 show that the probability of a negative |leap-second in 2029 is already more than 10%, even assuming the |Director uses his discretion to delay it as long as possible. | |And the "spaghetti" plot on pg. 49 shows TAI-UT1 from 36s…39s |already in 2030, and more than 32s…43 in 2035. | |That can be fairly and precisly be summarized as "We have NO idea what |goes on with Earth Rotation" :-) | |I guess we're done here ?
If only emission of TAI as a base would have been tackled earlier. But PTP is so old. --steffen | |Der Kragenbaer, The moon bear, |der holt sich munter he cheerfully and one by one |einen nach dem anderen runter wa.ks himself off |(By Robert Gernhardt) _______________________________________________ LEAPSECS mailing list [email protected] https://pairlist6.pair.net/mailman/listinfo/leapsecs
