Changeset 8921


Ignore:
Timestamp:
2017-12-06T15:50:26+01:00 (4 years ago)
Author:
mattmartin
Message:

Updated documentation after testing the compilation of the latex.

File:
1 edited

Legend:

Unmodified
Added
Removed
  • branches/2017/dev_r8657_UKMO_OBSoper/DOC/TexFiles/Chapters/Chap_OBS.tex

    r8919 r8921  
    563563For most observation types, the horizontal extent of the observation is small compared to the model grid size 
    564564and so the model equivalent of the observation is calculated by interpolating from the four surrounding grid 
    565 points to the observation location. Some satellite observations (e.g. microwave satellite SST data, or SSS data) 
    566 have a footprint which is similar size or larger than the model grid size (particularly when the grid size is small).  
     565points to the observation location. Some satellite observations (e.g. microwave satellite SST data, or satellite SSS data) 
     566have a footprint which is similar in size or larger than the model grid size (particularly when the grid size is small).  
    567567In those cases the model counterpart should be calculated by averaging the model grid points over the same size as the footprint. 
    568568NEMO therefore has the capability to specify either an interpolation or an averaging (for surface observation types only).  
    569569 
    570 The main namelist option associated with the interpolation/averaging is nn_2dint. This default option can be set to values from 0 to 6.  
     570The main namelist option associated with the interpolation/averaging is \np{nn\_2dint}. This default option can be set to values from 0 to 6.  
    571571Values between 0 to 4 are associated with interpolation while values 5 or 6 are associated with averaging. 
    572572\begin{itemize} 
    573 \item n2dint=0: Distance-weighted interpolation 
    574 \item n2dint=1: Distance-weighted interpolation (small angle) 
    575 \item n2dint=2: Bilinear interpolation (geographical grid) 
    576 \item n2dint=3: Bilinear remapping interpolation (general grid) 
    577 \item n2dint=4: Polynomial interpolation 
    578 \item n2dint=5: Radial footprint averaging with radius specified in the namelist as rn_???_avglamscl in degrees or metres (set using ln_???_fp_indegs) 
    579 \item n2dint=6: Rectangular footprint averaging with E/W and N/S size specified in the namelist as rn_???_avglamscl and rn_???_avgphiscl in degrees or metres (set using ln_???_fp_indegs) 
     573\item \np{nn\_2dint}=0: Distance-weighted interpolation 
     574\item \np{nn\_2dint}=1: Distance-weighted interpolation (small angle) 
     575\item \np{nn\_2dint}=2: Bilinear interpolation (geographical grid) 
     576\item \np{nn\_2dint}=3: Bilinear remapping interpolation (general grid) 
     577\item \np{nn\_2dint}=4: Polynomial interpolation 
     578\item \np{nn\_2dint}=5: Radial footprint averaging with diameter specified in the namelist as \np{rn\_???\_avglamscl} in degrees or metres (set using \np{ln\_???\_fp\_indegs}) 
     579\item \np{nn\_2dint}=6: Rectangular footprint averaging with E/W and N/S size specified in the namelist as \np{rn\_???\_avglamscl} and \np{rn\_???\_avgphiscl} in degrees or metres (set using \np{ln\_???\_fp\_indegs}) 
    580580\end{itemize} 
    581581The ??? in the last two options indicate these options should be specified for each observation type for which the averaging is to be performed (see namelist example above). 
    582 The n2dint default option can be overridden for surface observation types using namelist values nn_2dint_??? where ??? is one of sla,sst,sss,sic. 
     582The \np{nn\_2dint} default option can be overridden for surface observation types using namelist values \np{nn\_2dint\_???} where ??? is one of sla,sst,sss,sic. 
    583583 
    584584Below is some more detail on the various options for interpolation and averaging available in NEMO. 
     
    695695\end{itemize} 
    696696 
     697Examples of the weights calculated for an observation with rectangular and radial footprints are shown in Figs.~\ref{fig:obsavgrec} and~\ref{fig:obsavgrad}. 
     698 
    697699%>>>>>>>>>>>>>>>>>>>>>>>>>>>> 
    698700\begin{figure}      \begin{center} 
    699 \includegraphics[width=10cm,height=12cm]{Fig_OBS_avg_rec} 
     701\includegraphics[width=0.90\textwidth]{Fig_OBS_avg_rec} 
    700702\caption{      \label{fig:obsavgrec} 
    701 Weights associated with each model grid box (blue lines and numbers) for an observation at -170.5E, 56.0N with a footprint of $1\deg \time 1\deg$}  
     703Weights associated with each model grid box (blue lines and numbers) for an observation at -170.5E, 56.0N with a rectangular footprint of 1\deg x 1\deg.} 
    702704\end{center}      \end{figure} 
    703705%>>>>>>>>>>>>>>>>>>>>>>>>>>>> 
    704706 
    705  
    706707%>>>>>>>>>>>>>>>>>>>>>>>>>>>> 
    707708\begin{figure}      \begin{center} 
    708 \includegraphics[width=10cm,height=12cm]{Fig_OBS_avg_rad} 
     709\includegraphics[width=0.90\textwidth]{Fig_OBS_avg_rad} 
    709710\caption{      \label{fig:obsavgrad} 
    710 As for figure \ref{obsavgrec} but for a radial footprint with diameter $1\deg$. 
     711Weights associated with each model grid box (blue lines and numbers) for an observation at -170.5E, 56.0N with a radial footprint with diameter 1\deg.}  
    711712\end{center}      \end{figure} 
    712713%>>>>>>>>>>>>>>>>>>>>>>>>>>>> 
Note: See TracChangeset for help on using the changeset viewer.