[fitswcs] Re: [iaufwg] Thoughts about time coordinates

[David Berry]

Bill,

> > In any case, it does not pay to produce the Temporal Coordinates in
> > FITS paper until after the current ITU-R decision process calms down
> > with some sort of resolution.
>
> That's probably true, although it sounds like people are at least starting to
> think about what it would look like.  I did want to get my $0.02 in early in the
> process, particularly about the distinction between relative and absolute time.


As part of the work for supporting Arnold Rots STC schema within the
Starlink AST library, we had to add a specialised class of Frame to AST
to describe time. It may be interesting to those considering support for
time systems in FITS-WCS. It's documented at:

http://www.starlink.ac.uk/~dsb/ast/sun211.htx/node557.html

David