# Add Q, Psi, TwoTheta, Omega

## Summary
Add geometric information Q, Psi, TwoTheta, and Solid Angle to the data

## Metadata
- **Module ID:** XSGeometry
- **Module path:** /home/runner/work/MoDaCor/MoDaCor/src/modacor/modules/technique_modules/scattering/xs_geometry.py
- **Module version:** 20251122.1
- **Keywords:** geometry, Q, Psi, TwoTheta, Solid Angle, Omega, X-ray scattering

## Required data keys
- signal

## Modifies
- **Q**: signal, uncertainties
- **Q0**: signal, uncertainties
- **Q1**: signal, uncertainties
- **Q2**: signal, uncertainties
- **Psi**: signal, uncertainties
- **TwoTheta**: signal, uncertainties
- **Omega**: signal, uncertainties

## Required arguments
- detector_distance_source
- pixel_size_source
- beam_center_source
- wavelength_source

## Default configuration
```json
{
  "beam_center_source": null,
  "beam_center_uncertainties_sources": {},
  "beam_center_units_source": null,
  "detector_distance_source": null,
  "detector_distance_uncertainties_sources": {},
  "detector_distance_units_source": null,
  "pixel_size_source": null,
  "pixel_size_uncertainties_sources": {},
  "pixel_size_units_source": null,
  "wavelength_source": null,
  "wavelength_uncertainties_sources": {},
  "wavelength_units_source": null
}
```

## Argument specification
| Argument | Type | Required | Default | Description |
|---|---|---|---|---|
| `beam_center_source` | str or NoneType | Yes | - | IoSources key for beam center signal. |
| `beam_center_uncertainties_sources` | dict | No | {} | Uncertainty sources for beam center. |
| `beam_center_units_source` | str or NoneType | No | - | IoSources key for beam center units. |
| `detector_distance_source` | str or NoneType | Yes | - | IoSources key for detector distance signal. |
| `detector_distance_uncertainties_sources` | dict | No | {} | Uncertainty sources for detector distance. |
| `detector_distance_units_source` | str or NoneType | No | - | IoSources key for detector distance units. |
| `pixel_size_source` | str or NoneType | Yes | - | IoSources key for pixel size signal. |
| `pixel_size_uncertainties_sources` | dict | No | {} | Uncertainty sources for pixel size. |
| `pixel_size_units_source` | str or NoneType | No | - | IoSources key for pixel size units. |
| `wavelength_source` | str or NoneType | Yes | - | IoSources key for wavelength signal. |
| `wavelength_uncertainties_sources` | dict | No | {} | Uncertainty sources for wavelength. |
| `wavelength_units_source` | str or NoneType | No | - | IoSources key for wavelength units. |

## References
DOI 10.1088/0953-8984/25/38/383201

## Notes
This calculates geometric factors relevant for X-ray scattering data