[LEAPSECS] UT1 via NTP

[Steve Allen]

On Wed 2018-03-21T03:19:15-0700 Hal Murray hath writ:
> I haven't seen any comments from astronomers with info on how accurate they
> need UT1.

It depends.  I described several telescopes for Future of UTC.
paper 678 at
http://hanksville.org/futureofutc/2011/preprints/index.html

Optical telescopes have to be able to find a target where atmospheric
refraction amounts to several arc minutes, and unpredictable
variations of that can amount to many arc seconds.  So in many cases
one second of time is plenty good.

Our robotic telescope with small FOV on the guider does better if it
is given UT1 to 0.1 second.  That telescope grabs the USNO predictions
of EOP every week to update the pointing.

--
Steve Allen                    <sla at ucolick.org>              WGS-84 (GPS)
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