ITEM_TITLE      Calibration cascade
ITEM_ANAME      cascade

The processing of GIRAFFE calibration frames requires a cascaded scheme where
the mutual dependencies of products and raw frames are respected. The proper
sequence of all these production steps is called the calibration cascade. It
is described <a
href=/observing/dfo/quality/GIRAFFE/pipeline/cal_scheme.html>here</a>. <p>

Within that cascade, all products are checked with respect to their quality
and their relationship in time. This means e.g. that a dispersion solution is
not only generated using an arbitrary quality-checked localization solution,
but that specific solution is chosen which is closest in time.<p>

All products created by QC Garching follow the calibration cascade. On the
other
hand, Paranal-processed science data use 
standard solutions created by QC Garching and possibly
several months old.<p>