[fitsbits] Re: CROTA keyword

[William Thompson]

Folks:

I've gotten a number of responses by email, and I think I didn't explain myself
too well.  All of the responses I've gotten so far seem to assume that only one
of CROTA1 or CROTA2 appeared in the header.  That's not the case.  The keyword
was simply CROTA without any index.  Is that a common usage?

William Thompson

P.S.  Thanks to all who responded so far.


thompson at orpheus.nascom.nasa.gov (William Thompson) writes:

> I've encountered some FITS files which contain the keyword CROTA to denote a
> rotated 2D image.  My reading of the FITS standard (forgetting WCS for the
> moment) is that there really should be two keywords, CROTA1 and CROTA2, one
> for each axis.  Is that correct?

> William Thompson