On Thu 2019-07-04T00:35:32-0700 Paul Eggert hath writ:
Subject: [tz] [PROPOSED] Cite Rec. ITU-R TF.460-6 for leap seconds
In addition to the listed changes I suggest being more specific about the meaning of UT1 in leapseconds.awk by defining what is meant by "space".
print "# The International Earth Rotation and Reference Systems Service" print "# periodically uses leap seconds to keep UTC to within 0.9 s of UT1" print "# (which measures the true angular orientation of the earth in space)"
to
print "# The International Earth Rotation and Reference Systems Service" print "# periodically uses leap seconds to keep UTC to within 0.9 s of UT1" print "# (which is a measure of the angular orientation of the earth's crust" print "# with respect to a reference frame designed to match Newcomb's" print "# Tables of the Sun in Astronomical Papers Prepared for the Use of" pring "# the American Ephemeris and Nautical Almanac, Volume VI, 1895)"
as is nicely explained with full references https://en.wikipedia.org/wiki/Newcomb%27s_Tables_of_the_Sun -- 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