[fitswcs] inherit vs. concatenate

[Malcolm Currie]

> On Tue 2002-01-15T21:03:00 -1000, Malcolm J. Currie hath writ:
> >                                             The main question for
> > the Michelle headers is whether or not the PC matrix is here to stay.
> 
> We have an instrument now being dismantled for shipment to Mauna Kea.
> Even though there is still time to change the image acquistion
> software we have decided that DEIMOS will use the CDj_i matrix.
> The current drafts make it clear that we are perfectly safe
> doing so.

Indeed, but I much prefer the PC matrix for the reason just explained by
Doug.  It's much more transparent.

Malcolm