FF-Flat field an image (uses Jon Tonry's algorithm)

Description:

Flat fields an image using Jon Tonry's algorithm.

Parameters:

IMAGE

Name of data to be flat fielded.

FLAT

Name of flat field to be used.

ORDER

Order for flat field profile fit.

OUTPUT

Name of result of operation.

Source comments:

 F F

 Applies a flat field correction to an image.

 Command parameters -

 IMAGE  The name of the structure containing the image.

 FLAT   The name of the structure containing the flat
        field data.

 ORDER  The order of the fit to be applied to the flat
        field data profile.

 OUTPUT The name of the result of the operation.  This can
        be the same as for IMAGE.  If not, a new structure
        is created, with everything but the data a direct
        copy of the input.

                                  KS / CIT 31st MAy 1983