PDS_VERSION_ID       = PDS3
RECORD_TYPE          = STREAM

OBJECT               = TEXT
  INTERCHANGE_FORMAT = ASCII
  PUBLICATION_DATE   = 2019-06-01
  NOTE               = "This file describes the files in the document/ft
                        directory of this volume."
END_OBJECT           = TEXT

END

There are filter transmission files in this directory:

   ftinfo.txt       this file.

   ft_lir_pic.tab   Table-format text file with filter transmission value as a
                    function of wavelength for the filter of LIR instrument.

   ft_lir_pic.lbl   PDS label file for 'ft_lir_pic.tab'.