On 2017-07-17 18:46, Paul Eggert wrote:
Matthew Donadio wrote:
Wouldhttp://www.ursi.org/content/RSB/RSB_359_2016_12.pdf be a better reference? I know the article is open access on IEEE Xplore, but wouldn't the URSI one be canonical and always available? The URSI URL is for the entire issue, which is a bit off-putting. I doubt whether the IEEE Xplore version will go away any time soon; if it does, we can redirect. Ironically, the canonical URL does not work: https://doi.org/10.23919/URSIRSB.2016.7909995 I filed a bug report for that.
ISTM the canonical regulatory definition document is ITU-R TF.460, updated 2002-02, where it documents that UT1-UTC should not exceed 0.9s, the deviation of UT1==UTC+DUT1 should not exceed 0.1s, the magnitude of DUT1 should not exceed 0.8s, and authorizes the determination of these and announcement of leap seconds by IERS. It is available from: https://www.itu.int/dms_pubrec/itu-r/rec/tf/R-REC-TF.460-6-200202-I!!PDF-E.p... from: https://www.itu.int/rec/R-REC-TF.460-6-200202-I/en https://www.itu.int/rec/R-REC-TF.460/en https://www.itu.int/rec/R-REC-TF/en produced by: http://www.itu.int/en/ITU-R/study-groups/rsg7/rwp7a Background and history (with authority for use of UTC as civil time explained in sections 9 and 10) available from: https://www.cl.cam.ac.uk/~mgk25/time/metrologia-leapsecond.pdf -- Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada