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Analyzing a series of CIV and PATCH results:

The results are visualized with 'uvmat' like in the previous example. The absolute time of each field is displayed in seconds in the edit box 't' on the upper left (the first image is considered at the time origin t=0). The image time interval dt corresponding to each field is also shown, as well as the scales pxcmx and pxcmy on the rigth (these quantities are read in the same netcdf files as the velocity fields). To navigate through the fields in the menu 'ACTION/view_field', use the RUN '+d' and '-d' buttons, setting 'increment' to 100.

The series of velocity or vorticity fields can be seen as a movie by selecting 'movie' in the menu 'ACTION', taking for instance the whole range of fields, from 1 to 2000 in the edit boxes 'range1' and 'range2', with 'increment' set to 100: the action will be taken over all the pairs in this range. If the files are not available, the programme will look for a sequence with appropriate increment, and can also adjust 'range1' and 'range2' according to the first and last available fields. To keep a fixed scale of color code or arrow length during the movie, unselect the option 'auto' on the top of the interface.

The time averaged field over the selected range can be obtained by selecting 'average' in the menu 'ACTION' (use only filter fields to avoid problems in summing fields with unequal vector numbers).

The list of files on which 'ACTION' is performed can be displayed by selecting the option 'check_files' in the menu and pressing RUN '0'. Information on the last modification date and level of processing available (civ1, patch1..) is also indicated.

Statistics and time series analysis is discussed in next subsection. Finally, any processing can be performed on a series of fields, by selecting 'usr_defined' in the 'ACTION' menu, which allows you to select your personal processing function.

Figure 6: Statistics of a series of fields, with the 'plotgraph' interface (we compare the civ1 results with the pair -8|8 with the civ3 results with the pair -12|12).
\resizebox*{0.63\textwidth}{!}{\includegraphics{urms_good.eps}} \resizebox*{0.34\textwidth}{!}{\includegraphics{plotgraph_displ.eps}}


next up previous contents
Next: Statistics over a field Up: Analysing a series of Previous: Refined CIV:   Contents
Joel Sommeria 2004-10-11