%\subsubsection{File {\it input/data.pkg}}
%\label{www:tutorials}

This file, reproduced completely below, specifies the parameters
that the model uses for the Shapiro filter package (\cite{Shapiro_70},
section \ref{sect:shapiro-filter}).
The parameters that are significant for this configuration are:

\begin{itemize}

\item Line PUT_LINE_NB:Shap_funct=,
\begin{verbatim} 
 Shap_funct=2,
\end{verbatim} 
This line selects the shapiro filter function
to use, here S2 in this experiment
(see section \ref{sect:shapiro-filter}).

\item Lines PUT_LINE_NB:nShapT= and PUT_LINE_NB:nShapUV=,
\begin{verbatim}
 nShapT=4,
 nShapUV=4,
\end{verbatim}
Those lines select the order of the shapiro filter
for active tracer ($\theta$ and $q$) and momentum respectively. 
This sets the integer parameter $n$ to 4, in the equations of 
section \ref{sect:shapiro-filter}, which implies a 8th order
filter.

\item Lines PUT_LINE_NB:nShapTrPhys= and PUT_LINE_NB:nShapUVPhys=,
\begin{verbatim}
 nShapTrPhys=0,
 nShapUVPhys=0,
\end{verbatim}
Those lines select the order of the physical space filter 
(filter function S2g, in section \ref{sect:shapiro-filter})
that applies to for $\theta$ and $q$ and for $u$ and $v$ respectively.
The difference $ nShapT - nShapTrPhys $ and $ nShapUV - nShapUVPhys $
correspond to the order of the computational filter
(filter function S2c, in section \ref{sect:shapiro-filter}).

\item Lines PUT_LINE_NB:Shap_Trtau= and PUT_LINE_NB:Shap_uvtau=,
\begin{verbatim}
 Shap_Trtau=5400.,
 Shap_uvtau=1800.,
\end{verbatim}
Thoses lines set the time scale of the filter (in seconds), 
for $\theta$ and $q$ and for $u$ and $v$ respectively,
to 5400 s (90 min) and 1800 s (30 min) respectively.
Note that a shorter time scale means a stronger filter, and
that the time scale cannot be smaller than the time-step $\Delta t$
of the model.

\end{itemize}

The entire file {\it input/data.shap} is reproduced here below: