This hasn't even been fully correct during the times when UT1 was observed with zenith telescopes (before about 1980). It is incorrect today -- all the seven parameters of Earth orientation are of course determined together, and UT0 is no longer needed nor used by anybody.
Are the details about UT1 correct in this link? http://hpiers.obspm.fr/iers/bul/bulb/explanatory.html I ask because a number of posters claim UT1 is a measure of earth angle. At one level this is true, of course, but if I read that document correctly it says that certain periodic terms have been removed from UT1. I think that's where the confusion arises -- it makes UT1 seem more like it's trying to be a clock and less like a precise measure of angle. Perhaps you can clear up the mystery. /tvb _______________________________________________ LEAPSECS mailing list [email protected] http://six.pairlist.net/mailman/listinfo/leapsecs
