pyFAI
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Perform calibration in any output space ...
While the geometryRefinement has been optimized for fault tolerance on large images with ill-defined center/distances, for very fine refinement as it is sometimes done with goniometer setup, it would be nice to be able to perform the lease-squares fitting in a different space (2th_deg for example).
To enable this, the calibrant should be able to report the theoretical position in various units ... then upgrade GeometryRefinement
Linked to some bug reported by ID03
duplicate of #620