mx/Jungfraujoch
2
1
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 72 Wiki Activity

rugnux docs: cut the XDS-convention section to the size of what it describes

Browse Source 
It is one log line and two gotchas, and it had grown a bulleted list and a
closing paragraph on a par with the sections describing whole modes of the
program. Same facts, one paragraph.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y5XisyYxmF8mUEQjzpMRe2
This commit is contained in:
leonarski_f
2026-08-25 07:11:09 +02:00
co-authored by Claude Opus 5
parent 5aaff2adaf
commit a5c58c3142
1 changed files with 7 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files
docs/RUGNUX.md
+7 -11
View File
@@ -295,17 +295,13 @@ XDS convention: ROTATION_AXIS= -1.000000 0.000000 0.000000
```
XDS is never given this geometry — the [XDS plugin](SOFTWARE_INTEGRATION.md) supplies image data
only, and XDS refines its own from `XDS.INP` — which is exactly what makes the comparison worth
having. The two laboratory frames coincide (x along increasing detector column, y along increasing
row, z along the beam), so the numbers are directly comparable. Two things to keep in mind:
- **`ORGX`/`ORGY` are 1-based**, because XDS counts pixels from 1 while Jungfraujoch counts from 0.
- They are the **PONI**, the foot of the perpendicular from the crystal, not the direct beam — the
same quantity Jungfraujoch's beam centre is, so no correction is needed, but not the same as the
direct beam once the detector is tilted (see above).
A tilt is reported as the two detector axis vectors rather than as angles, which is how XDS reports
it after refinement.
only, and XDS refines its own from `XDS.INP` — which is what makes the comparison worth having. The
two laboratory frames coincide (x along increasing detector column, y along increasing row, z along
the beam), so the numbers are directly comparable, and a tilt appears as the two detector axis
vectors rather than as angles, which is how XDS reports it after refinement. Two things to keep in
mind: **`ORGX`/`ORGY` are 1-based**, because XDS counts pixels from 1 and Jungfraujoch from 0; and
they are the **PONI**, the same quantity Jungfraujoch's beam centre is — so no correction is needed —
but not the direct beam once the detector is tilted (see above).
## Quick start