[LEAPSECS] the abbreviation UTC

Steve Allen sla at ucolick.org
Sun Aug 14 21:29:47 EDT 2011


On Sun 2011-08-14T17:38:45 -0700, Steve Allen hath writ:

> The bottom line is that CCIR 536 did recommend "UTC" for use

> independent of language, but they did so in consideration of and

> citing the usage of that term by the CGPM.


In other curious timing, it was only earlier this year that TF.536
was suppressed by the ITU-R
http://www.itu.int/rec/R-REC-TF/en
but it was also the case that in 1978 the CCIR approved recommendation
535. TF.535-2 is still in force
http://www.itu.int/rec/R-REC-TF.535/en
and just as it did originally in 1978 it asserts that the basis
for the ITU-R usage of the term UTC was established by the
CGPM in 1975 and the IAU in 1973. Both the CGPM and the IAU
recommendations explicitly recognized UTC as mean solar time.

Therefore the standing documents of the ITU-R argue against any
change to UTC which would make it not be mean solar time.

--
Steve Allen <sla at ucolick.org> WGS-84 (GPS)
UCO/Lick Observatory--ISB Natural Sciences II, Room 165 Lat +36.99855
1156 High Street Voice: +1 831 459 3046 Lng -122.06015
Santa Cruz, CA 95064 http://www.ucolick.org/~sla/ Hgt +250 m


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