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There is one L0 FITS per observation.
It contains all of the raw data from the observation.
Within HDU 1 it also contains header data from the overall system (i.e. telescope and observatory) that is not contained within the sub-FITS headers
...
...
There is one L0 FITS per observation.
It contains all of the raw data from the observation.
Within HDU 1 it also contains header data from the overall system (i.e. telescope and observatory) that is not contained within the sub-FITS headers
...