[fitsbits] complex integers ? (was 64-bit ...)
Thierry Forveille
forveill at cfht.hawaii.edu
Fri May 13 15:38:34 EDT 2005
LC's No-Spam Newsreading account writes:
> On Fri, 13 May 2005, William Pence wrote:
>
> > > ...and while on the subject, can anyone explain the purpose of
> > > "integer complex" keyvalues?
>
> Complex variables is another thing I've never used in real life (only
> once as a student doing a very naive model of the hydrogen atom, and
> once playing a Mandelbrot set generation program) :-)
>
Interferometric visibilities are intrisically complex, so radio interferometers
have used complex variables in FITS for a long time. The cases that I know
don't put them in header keywords, but there might be some that do.
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