Rotation, report only: once the first pass has its lattice, the spots it leaves over (ice left
out) are indexed again with a fresh rotation indexer, up to three times. A lattice is kept when
the leftover validation spots sit on it far more often than at a displaced spindle angle (z >= 5,
the first pass's own null), and classified against the main lattice: a misoriented domain of the
same cell (split crystal), one turned by 180 deg (non-merohedral twin domain), one concentrated
in part of the sweep (>= 60% of its spots in 2 of 8 blocks), a related cell (volume n or 1/n) or
an unrelated one. Misorientation is the minimum over the bases whose metric matches, so a lattice
symmetry is not read as one. EXTRA_LATTICE_* keys, a summary row, and a MULTIPLE_LATTICES warning
where domains or an unrelated lattice hold >= 10% of the non-ice spot intensity (29 of 200
battery sets in the exploration census). Its own IndexAndRefine instances and indexer: merged
MTZ byte-identical on three sets; 0.2-2.5 s per run.
Also MOSAICITY_DEG (median, P10, P90 over frames) - the frame-order-smoothed sigma_M the merge
computes partiality from, Kabsch's sigma_M as XDS's REFLECTING_RANGE_E.S.D. - in the report.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01D1G8gJVAy6gp1K5Dz3NE5C
leonarski_fandClaude Opus 5.5
ddf718f91b