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+==== Objective ====
+==== Description ====
+interp.bash is a script encapsulating the interpolator and the preparation of its namelist. It
+is able to interpolate from and to 11 different horizontal grids
+(ORCA1t_v2.2/ORCA1t_v3.2/ORCA025t_v3.2/ERA40/ERAint/EcEarth2/EcEarth3/HadISST/NCEP/NOAAv3b/NSIDC)
+and with 4 different interpolation (conservative, bilinear, bicubic, distance-weighted) methods.
+Usually, the conservative method is used for surface fluxes or tas/tos which ensures that their
+global mean is conserved through the interpolation. If you are interested in extremes, it is
+better to use the bicubic method which avoid smoothing the extrema. interp.bash can interpolate files
+with dimentions (lon,lat) or (lon,lat,time). The input file is written also in the output file so that you can
+check whether it is correctly read by the interpolator. All the attributes of your variable and history
+of your input file will be copied to the output file.
+interp.bash compensates for the  unability of cdo to
+interpolate from and to irregular grids. The interp.bash script should be used to interpolate from and to
+the various ORCA grid which we manipulates at CFU.
+For any other interpolation, you can use cdo. Running interp.bash without argument will
+print an help. For any questions about the script and interpolator itself, please feel free to ask
+Virginie. If you want to include a new ORCA grid, Isabel can also teach you how to prepare your weights.
+If the default options chosen by interp.bash do not fit your needs, you'll need to know a bit more
+about the interpolator itself. The interpolator is named scrip_use and it is stored at
+https://dev.cfu.local/cfu_tools.git interpolation folder. It uses weights computed with SCRIP, a free software that you
+can download. scrip_use works with a namelist named scrip_use_in. An example can be
+found in https://dev.cfu.local/cfu_tools.git interpolation folder. In case your input field appears upside down in the output file,
+put the invertlat option to TRUE in the namelist. A second interpolator, named scrip_use_extrap, is also
+in the directory. The namelist is exactly the same as scrip_use. It also works both on (lon,lat)
+and (lon,lat,time) fields. The difference is that after the interpolation (bicubic/bilinear/conservative/neighbour)
+scrip_use_extrap performs an extrapolation to fill the missing value by the neighbour method. This can be useful
+if for example your input and output grid do not have the same land-sea mask. scrip_use will put missing value in
+the interpolated field where there is no data in the input field to interpolate while scrip_use_extrap will fill in these
+blanks by an extrapolation. So the interpolator to use depends on what you want to do with your interpolated field.
+=== List of functions ===
+==== Requirements ====
+==== Use ====
+==== Repository ====
+The link to the GIT repository is https://dev.cfu.local/cfu_tools.git
+==== Contact ====
+The coordinator of this project is Domingo Manubens Gil <domingo.manubens@ic3.cat>
+Virginie Guemas <virginie.guemas@ic3.cat>
+As a new user, please register to this mailing list: http://cfutools.ic3.cat/mailman/listinfo/cfutools
+You'll then have access to the history of all the emails sent to the users and presenting the
+functions and their available options.
+==== Development ====
+=== Package structure ===
+=== How to develop ===
+Download the repository folder to your computer ( git clone https://dev.cfu.local/cfu_tools.git <local_folder> ) and check-out to the branch you want to develop in.
+=== Steps to add a new function to a package ===
+  *  Put the code of the function in a file.
+  *  Make sure the code of the function follows the style rules (information below header, history, ...).
+  *  Fill in the file with the function documentation.
+==== Style Guide ====
+You can check the style guide for the Interpolation package [[tools:style_guides:bash|here]]

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