[fitswcs] Units along spectral axes

Mark Calabretta mcalabre at atnf.CSIRO.AU
Fri Jun 10 02:54:03 EDT 2005


On Thu 2005/06/09 15:41:09 -0400, William Thompson wrote
in a message to: David Berry <dsb at ast.man.ac.uk>
and copied to: FITSWCS <fitswcs at donar.cv.nrao.edu>

>I think that it's fair to make the statement that data providers using one of 
>the non-linear algorithm codes of Table 2 cannot expect that the projection 
will
>be applied correctly unless the coordinate units are specified following the 
>prescription of Paper I.  The best place for this statement would probably be 
in
>section 3.4.4, in the discussion of the RESTWAVa and RESTFRQa keywords, 
though
>it also applies to the projections involving air wavelengths, and the grism 
>projections.

I certainly agree with your sentiment, and have no objection to such a
statement (perhaps better associated with Table 1 or 2), but otherwise -
I wish you the best of luck!

Mark Calabretta




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