[fitswcs] Polynomial Correction Function & Alternative-WCS

[Doug Mink]

Don Wells wrote:
> 
> Don Wells writes:
>  >      Polynomial Correction Function, Alternative-WCS Descriptions
>  >                  DRAFT-for-comments 1998-05-06
> 
>  > ..  The polynomial coefficients
>  > will be specified by keywords of the form:
>  >
>  >     CPn  = <E-format-value> / coeff of polynomial term n
>        ^^
>        WC
> 
> I think 'WC' might be a better choice for the prefix.

> I suspect that in the celestial coordinate case CRVALi must be carried
> to the celestial coordinate step of the calculation; probably I should
> withdraw my CRVAL1 --> CP1000 suggestion. I still think that the CDi_j
> keywords can be replaced by WCn (CPn).

I think that if we keep CRVALi, we should keep CPinnnn

-Doug