It is possible to have the dark current removed from PFI and FFI images
by using the following command:
IDL> data_out = dark_sub(index,data)
The routine can interpolate between two reference images to simulate the
input exposure duration by using the /interpolate option. It will call
the routine GET_DC_IMAGE to get the proper image and take the
subsection for the PFI cases. The SDC data files for the time period
being calibrated must be in the directory $DIR_SXT_SDC.
The /interpolate option can be turned on and run automatically
every time DARK_SUB is run by setting the environment variable
ys_dark_interp. An example of how to turn this on and off
is:
% setenv ys_dark_interp 1 # will enable automatic interplation
% unsetenv ys_dark_interp # will disable automatic interplation
LEAK_SUB calls DARK_SUB if the input data is BYTE type, so normally a user does not need to call DARK_SUB
directly.