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Figure 4
OM determination from a pair of reflections based on the SPIND algorithm. Scattering vector lengths and angles between them are calculated based on observed spot positions. On comparison with a reference table based on known unit-cell parameters, the reflections are indexed. The orientation matrix relative to the laboratory frame is then easily determined as the matrix that rotates the same reflections on top of each other.

IUCrJ
Volume 10| Part 1| January 2023| Pages 103-117
ISSN: 2052-2525
https://doi.org/10.1107/S2052252522011782