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Description
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Performs a solid angle correction on all detector pixels.
This algorithm is usually called by
:ref:`SANSReduction <algm-SANSReduction>` or :ref:`HFIRSANSReduction <algm-HFIRSANSReduction>`.

The solid angle correction is applied as follows:

:math:`I'(x,y)=\frac{I(x,y)}{\cos^3(2\theta)}`

:math:`\sigma_{I'(x,y)}=\frac{\sigma_{I(x,y)}}{\vert\cos^3(2\theta)\vert}`

If *DetectorTubes* is set to True, the correction is calculated according to a tube geometry. The cosine term above then becomes:

:math:`\cos^3(2\theta) \rightarrow \cos^2(2\theta) \cos(\alpha)`

where :math:`\alpha`: is the angle between the sample-to-pixel vector and its projection on the X-Z plane.


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