[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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