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Preparing Your Calibration Frames
Before the actual processing can start, multiple calibration frames
have to be combined into a master. The command that takes care of
combining the calibration frames in the CCD package is COMBINE/CCD. It
provides various methods to improve the S/N statistics in the
resulting output frame. Depending on the actual parameter settings,
the command can take into account the exposure times in the combining
process, and can adjust for a (variable) sky background.
Petra Nass
1999-06-15