[LEAPSECS] leap second roundup 2017

[Steve Allen]

The next meeting of ITU-R WP7A starts Wednesday, so contributions are at
https://www.itu.int/md/R15-WP7A-C/en
and two of them are related to leap seconds

The BIPM has contributed
CGPM draft Resolution "On the definition of Time-Scales"
For two years various meetings have indicated that a document like
this was under construction, so this is probably that result.

A draft of the document seems to be at
http://www.iaufs.org/CCTF%20Recommendation-DRAFT.pdf
It largely seems to be a formal way for the CGPM to update the
definition of TAI and UTC to match what the IAU did over a decade ago.
Unsurprisingly it makes no mention of the connection between the
calendar day and UT1.

https://iag.dgfi.tum.de/fileadmin/IAG-docs/Travaux2017/21_BIPM_2015-2017.pdf
says that the document was approved at the 21st CCTF meeting in June and
will be presented to CGPM in November.
This is reiterated in Lewandowski's CGSIC presentation
https://www.gps.gov/cgsic/meetings/2017/lewandowski.pdf
which also notes that Bernard Guinot died earlier this year.

The United States has contributed
Draft new Report ITU-R TF.[UTC] - The International Time Scale, Coordinated Universal Time (UTC)
which is probably similar to the attachment.
It is a synopsis of history and dramatis personae for UTC, and again
unsurprisingly it omits any discussion of the connection between
calendar days and Universal Time.

--
Steve Allen                    <sla at 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           http://www.ucolick.org/~sla/   Hgt +250 m
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IntlTimeScaleUTC.pdf
Type: application/pdf
Size: 132395 bytes
Desc: not available
URL: <https://pairlist6.pair.net/pipermail/leapsecs/attachments/20171022/363c32f1/attachment-0001.pdf>