1. If you do not have track data loaded see Trajectory Display.
2. For performance reasons we want to subset the point data.
   • Right click on the track.nc entry in the Data Sources section.
   • Select Subset Point Data
   • Select all fields under Current Fields by clicking in the list and pressing Control-A.
   • Remove all selected fields by pressing Remove
   • Select the fields of interest. e.g., Altitude down to Dew/Frost Point Temperature with successive Control-clicks or Shift-Clicks.
   • Press Add
   • Press OK
3. Create the Point Data Plot display.
   • In the Fields panel select the Point Data field.
   • In the Displays select Point Data Plot and press Create Display
   • When the IDV asks if you want to see all of the times select No.
   • Change the Station Model used to be Airplane
4. Change the track time display
   • Bring up the display control window for the Track display.
   • Press Time Mode Change button.
   • For End Time choose From Animation Time
   • For Start Time choose Relative to End Time
   • Change the Offset for the start time to be -30 minutes.
5. Turn on animation.
6. For the point display change the Station Model used to be TrackDewpoint

Unidata IDV Workshop for version 6.1u1 > Accessing and Displaying Data > Trajectory Data