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Diffstat (limited to 'doc/source/npol.rst')
| -rw-r--r-- | doc/source/npol.rst | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/source/npol.rst b/doc/source/npol.rst index 89c3a67..b398be1 100644 --- a/doc/source/npol.rst +++ b/doc/source/npol.rst @@ -37,7 +37,7 @@ New representation - look-up tables The fine scale distortions represented in the ``DGEO`` images can be stored in smaller look-up tables without significant loss of information. These look-up tables follow the conventions -in WCS Paper IV [2]_. Record-valued keywords are used to map an image in the science extension +in the WCS FITS Distortion Paper [2]_. Record-valued keywords are used to map an image in the science extension to a distortion array in the ``WCSDVAR extension``. This new type of FITS keywords has been implemented in PyFITS and is fully described in [2]_. Specifically, ``DPj.EXTVER`` in the science extension header maps the science image to the correct ``WCSDVAR`` extension. The dimensionality |