diff options
Diffstat (limited to 'doc/npol_tsr/source/index.rst')
| -rw-r--r-- | doc/npol_tsr/source/index.rst | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/doc/npol_tsr/source/index.rst b/doc/npol_tsr/source/index.rst index 733ccdc..2210ca0 100644 --- a/doc/npol_tsr/source/index.rst +++ b/doc/npol_tsr/source/index.rst @@ -6,6 +6,19 @@ TSR 2012-03: NPOL Reference File NPOL Reference File TSR ======================= +.. abstract:: + :author: Nadezhda Dencheva, Warren Hack + :date: 12 Oct 2010 + + The HST pipeline originally used two types of reference files to correct for distortion: + ``IDCTAB`` files which contain the coefficients for a polynomial correction and + ``DGEO`` files which are images with the residual distortion. A new format for the residual + distortion, called ``NPOL`` files (extension ``_npl.fits``), is presented in this document. + The conversion from ``DGEO`` files to ``NPOL`` files is described and an example of the format is given + using ACS/WFC F606W filter. Tests of the conversion procedure show that the + differences between the ``DGEO`` files and ``NPOL`` files are of the order of :math:`10^{-4}` + pixels. + Contents: .. toctree:: |