if [ $# == 0 ] ; then
   files=*.fits
else
   files=""
fi 

dfits $files $@ | fitsort FT.ROBJ.NAME INS.SOBJ.NAME DPR.TYPE INS.POLA.MODE INS.SPEC.RES INS.MET.MODE ISS.FEED.MODE INS.PMC1.MODULATE DET2.SEQ1.DIT INS.SOBJ.X INS.SOBJ.OFFX INS.SOBJ.Y INS.SOBJ.OFFY