Changes in doc/index.rst [5e1d6b0:8ae8532] in sasmodels

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• doc/index.rst (modified) (3 diffs)

doc/index.rst

@@ -1 @@
-Introduction
-============
+sasmodels
+=========
+Small angle X-ray and Neutron scattering (SAXS and SANS) examines the
+scattering patterns produced by a beam travelling through the sample
+and scattering at low angles.  The scattering is computed as a function
+of reciprocal space $q$, which arises from a combination of beam wavelength
+and scattering angles. Each pixel on the detector corresponds to
+a different scattering angle, and has a distinct $q_x$ and $q_y$. If the
+sample is unoriented, the scattering pattern will appear as rings on the
+detector.  In this case, a circular average can be taken with 1-dimension
+data at $q = \surd (q_x^2 + q_y^2)$ compared to the orientationally
+averaged SAS scattering pattern.
+
 The sasmodels package provides theory functions for small angle scattering
-calculations.
+calculations for different shapes, including the effects of resolution,
+polydispersity and orientational dispersion.
 
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@@ -15 +27 @@
 
    guide/index.rst
+   guide/models/index.rst
    developer/index.rst
-   ref/index.rst
-   ref/models/index.rst
    api/index.rst
 
@@ -28 +39 @@
 .. htmlonly::
   * :ref:`search`
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