infil1,s,a,,,,"Name of 1st FITS image file" infil2,s,a,,,,"Name of 2nd FITS image file" outfil,s,a,,,,"Name of OUTFIL FITS file " orient,s,a,"LR",,,"Left to Right (LR) or Bottom to Top (BT)" datatype,s,h,"E",,,"Data type of the output file (BIJED)" copyprime,b,h,yes,,,"Copy keywords from primary array of infile?" clobber,b,h,no,,,"Clobber existing output file?" mode,s,h,"ql",,,