If necessary, select Level II data and times as described in Accessing WSR-88D Level II Radar Data.

1. If other displays are in the main IDV window, select the Edit→Remove All Displays menu item or the icon in the toolbar to clear them out.
2. Select one of the times for this dataset.
   • Open the Data Source Properties editor for Level II Radar Data (DVN).
   • From the Times tab, select 1998-06-29 21:29:59Z time.
   • Click the OK button.
3. In the Field Selector window create a Volume Scan (all sweeps) display using the Reflectivity field.
4. See the display in 3D.
• The 3D display of all sweeps appears in the main window.
  

  In this display each bin value is represented by a single pixel colored by value. Since the sweeps are not solid images there is a degree of transparency.

• Rotate to see the display in 3D. Zoom in to see individual data point values in single beams.
• Check the box next to the Visible Range label in the control and then click the Change button to change the range of data that is visible. Set the range to be from 30 to 50.
• The resulting plot will show only the pixels where the values are between 30 and 50 dBz.

Unidata IDV Workshop for version 6.2u2 > Accessing and Displaying Data > WSR-88D Level II Data Displays