Modify header cards in a single FITS image.

 

% single_hdfix --help   

Usage: single_hdfix A.fits cards.file B.fits   
arg1 - name of original image    
arg2 - file containing new header card lines  
arg3 - output FITS filename 
Additional options: 
     -v = print verbose comments 
 --help = view a help document 

Example: 
%  cat a.1 
NSTACK  =                   1  / number of image in stack 
NSTRAS  =                 221  / number of stars 

%  imhead iset_1_stack.fits  (last few lines)  
ACMBASE =  20190724T030410.8_ /FITS image basename
FBPCOR  =                   Y / fixed bias pattern correction applied (Y/N)
BIASMEAN=           1400.0135 / mean bias subtracted
BIASSIG =              1.0782 / stan.dev. of bias among images
END

%  single_hdfix iset_1_stack.fits a.1 B.fits 
%  imhead B.fits  (last few lines) 
ACMBASE =  20190724T030410.8_ /FITS image basename
FBPCOR  =                   Y / fixed bias pattern correction applied (Y/N)
BIASMEAN=           1400.0135 / mean bias subtracted
BIASSIG =              1.0782 / stan.dev. of bias among images
NSTACK  =                   1  / number of image in stack
NSTRAS  =                 221  / number of stars
END