.. include:: ../../wlsubstitutions.rst
.. _wlinpintro:

Introduction
===============

The OU-LE3 WL PFs take the following products as inputs:

* :ref:`WLPosShearCatalog`
* :ref:`WLPosCat`
* :ref:`WLProxySheCatalog`


All three catalogues are generated by Catalog Column Reduction (CATRED) from OU-MER, OU-PHZ and OU-SHE output products. The position catalogue (DpdWLPosCatalog) and the proxy shear catalogue (DpdWLProxyShearCatalog) are used exclusively by 2PCF-WL, while the shear catalog (DpdWLPosShearCatalog) is used by 2PCF-WL (3x2pt stats), PK-WL (power spectra) and 2D-MASS-WL (mass maps).