Normally, you should use SXT_PREP to do the decompression, background
subtraction, and stray light subtraction (pinhole leak). For example:
IDL> SXT_PREP,index,data,new_index,new_data,unc,sat
IDL> SXT_PREP,index,data,new_index,new_data,unc,sat,/register
The variables unc and sat are arrays that contain, respectively, the
decompression error and information about the saturated pixels.
It is not necessary to exposure normalize the data.
See the Reference Guide or Section 4.2 of the User's Guide for more information about running SXT_PREP.