The Special Diodes file is a copy of the Extracted Data file that contains the calibrated values of the special diodes; this is used for such purposes as background removal. These special diodes do not have photocathode granularity removed, background subtracted, echelle ripple removed nor are they converted to absolute flux units. Calibrated Special Diodes files are identified by the extensions ``.C3H'' and ``.C3D''.
