4.2.2 Probing Level III Data
Just as we could probe gridded data, we can also probe the
satellite and radar images.
First, let's add a data probe to the display we created in
the previous exercise.
- Complete the previous two exercises.
- In the
Field Selector window,
make sure the
DVN (Base Reflectivity Tilt 1)
dataset is selected in the
panel and the
Image Sequence field
is selected in the
Displays panel, select
Data Probe/Time Series, and then click the
Create Display button.
- In the main view window, you will see a small red probe
in the middle. Move the probe around over the echoes and
notice the value changing in the
Data Probe control window.
Can't find probe?
- Set the time animation to the first timestep.
- Move the probe to the leading edge of the bow echo and turn
on the time animation. Note that the value readout
Probe control changes
to show the value at that position for each time step.
- Stop the animation and return to the first timestep.
- Use the menu
to add in the range and bearing tool. Position the left end
point of the probe on the radar grid at 100km and 180 degrees.
- Animate through the time sequence one step at a time, keeping
track of where the cell that was under the left end point of the
probe has moved to. Stop on the last timestep.
- Position the right end of the range and bearing probe at
the point where the cell has moved to. How fast did the storm move?
- Remove all displays.
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