The files in these directories contain data used for calibration of
    SUMER spectral images.

    In particular:

    The directory [flight.ff] contains all flatfield correction matrizes
    available as IDL restore files.  The orientation of the images is
    compatibel with the FITS files orientation (, i. e., North is down,
    wavelength to the right).  The data can be used for flatfield
    correction using the program contrib:[schuehle]SUM_FLATFIELD.pro.

    The directory [flight.ffraw] contains all flatfield raw images used to
    calculate the flatfield correction matrizes.  They can be used to
    build your own flatfield correction.

    The directory [flight.fflatfield] contains the flatfield data obtained
    from the telemetry converted to FITS files.


    U. Schuehle, 5. MAY 1998    

---------------

    The Original files appear   in CALIBRATION:[000000]       in Sumer VMS machine
	SUMOP1.NASCOM.NASA.GOV	     (NON anonymous access)
    They are currently mirrored in CALIBRATION:[000000]       in Sumer VMS machine
	SIRIUS.MEDOC-IAS.U-PSUD.FR   (NON anonymous access)
    They are currently mirrored for public access in
	HTTP://SOHOWWW.NASCOM.NASA.GOV/SDB/SOHO/SUMER/CALIBRATION/

    Programs to use this data appear in CONTRIB:[SCHUEHLE]    in Sumer VMS machine
        SUMOP1.NASCOM.NASA.GOV       (NON anonymous access)
    They are currently mirrored      in CONTRIB:[SCHUEHLE]    in Sumer VMS machine
        SIRIUS.MEDOC-IAS.U-PSUD.FR   (NON anonymous access)
    They are currently mirrored for public access in
        HTTP://SOHOWWW.NASCOM.NASA.GOV/SOLARSOFT/SOHO/SUMER/CONTRIB/SCHUEHLE/


    C. Maurel, 5 Mai 1998