2. Select Options.
The Time-Height Output Options menu is shown.
3. In Color Background, choose the information that you want displayed in the
background.
4. In Overlay Plot, Choose the type of overlay plot.
• Wind barbs use the standard meteorological convention of 1/2 barb for 5 knots, 1
barb for 10 knots and triangles for 50 knots.
• Wind strings point away from the wind direction, with the length of the string
indicating the relative wind speed.
You can set the maximum length of the wind strings using the Display Style >
Graphs Scale Limit for wind speed.
• Axis of Dilatation lines show the angle of "stretching".
Fronts tend to form parallel to this angle. The length is proportional to the
deformation which indicates the strength of the stretching.
You can set the maximum length of the dilatation using the Display Style > Graphs
Scale Limit for deformation.
• Select None if you do not want to display an overlay plot.
5. In Time Span min, set the duration of the time (horizontal) axis in minutes.
6. In Time Step min, set the minimum time step for plotting data.
This is useful to avoid collisions of the wind barbs when the data are closely spaced.
Type 0.0 to see all the data.
For example if there is a VVP profile every 5 minutes and this field is set to 10, then
every other profile is plotted.
7. In Max Height km, type the maximum height (vertical scale) that you want to display.
Note that the height of the VVP profile may be less than the height that you display, in
which case a blank background color is shown.
IRIS Product and Display User Guide M211319EN-H
252 RESTRICTED
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