[time-nuts] Calculating sidereal time

[Jim Harman]

Off by leap seconds * 2?

On Sat, Jan 19, 2019 at 10:09 AM Didier Juges <shalimr9 at gmail.com> wrote:

> On Fri, Jan 18, 2019 at 11:00 PM Steve Allen <sla at ucolick.org> wrote:
>
> >
> > This expression is no longer in use.  It was superseded Capitaine et al.
> >
> >
> http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2003A%26A...406.1135C
> > in which formalism it is explicitly disavowed that earth rotation is
> time.
> >
> > Thank you for that interesting paper. I see the reason for the new
> definition:
>
> "The new expression for Greenwich Sidereal Time, GST, has to be in
> agreement at the microarcsecond level, for one century."
>
> That implies the old equation did not do that but it does not look like
> it's causing my problem.
> Related to earth rotation, a microarcsecond is 15 times smaller than a
> microsecond.
> I have a 57 seconds error. I still have an error somewhere unrelated to
> using the old equation.
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-- 

--Jim Harman