How parameters derived from the spot shape (such as mosaic block
size and rotation, beam divergence, and crossfire) and their
errors were estimated. See the related items section.
This can be a written description or a citation to a specific
software package that determined these parameters.
Note, these parameters are considered derived terms from the
data, as opposed to measured terms from the instrument (such
as diffrn_radiation.div_x_source, a term similar to