infile,s,a,,,,"Name of the input FITS file and extension" outfile,s,a,,,,"Name of the output FITS file" cols,s,a,,,,"Name of the vector column (or ranges for image)" rows,s,a,"-",,,"List of rows to be extracted" operation,s,h,"stack",,,"Operation to perform on the rows (sum,avg,stack)" nullval,i,h,-99,,,"Value in output file to represent integer NULLs" clobber,b,h,no,,,"Overwrite existing output file?" copykeys,b,h,yes,,,"Copy relevant keywords from input to output file?" history,b,h,yes,,,"Put history keywords into output file?" mode,s,h,"ql",,,