.. _tweakreg:

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TWEAKREG: Alignment of Images 
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Combining images using astrodrizzle requires that the WCS information in the headers of each input image align to within sub-pixel accuracy.  The 'tweakreg' task allows the user to align sets of images to each other and/or to and external astrometric reference frame or image.
    
.. automodule:: drizzlepac.tweakreg

.. autofunction:: TweakReg

.. autofunction:: help
     
