Previous: Loading Satellite Imagery Next: Probing Level III Data Table of contents Index Glossary Images Frames U09-NRM-127: The role of Distributed Data Access Technologies in NRM - for ITC-IDV version 2.7 > Accessing and Displaying Data > Displaying Satellite and Level III Radar Imagery

4.2.1 Level III Radar Image Displays
Real-time Level III radar data is available from the network of ADDE servers in the Unidata community. At present, the IDV can only read Level III data from these servers.

In this exercise we'll display the Level III radar images for the super cell area that we loaded in the previous exercise.

  1. Open a new View Window by selecting the File->New->View Window->Map Display->One Pane menu. By default, the IDV will load data into the currently selected View Window. Minimize the other window with the satellite image in it for now.
  2. Open the Data Source Chooser. Show popup. Click on the Radar tab, then the Level III tab.
  3. We'll load in Level III Data from the Bow Echo Case Study. In the Server: selector, choose adde.ucar.edu. In the Dataset: selector, choose CCS039R. If either of these is not in the list, just type them in. When you have made your selections, click the Connect button.
  4. The IDV connects to the specified server and retrieves the types of radar data available in the dataset and the stations for which those data are available. On the station map, you will see DVN which is Davenport, Iowa. Click on this label to select it.
  5. Using the Radar Data Type: selector, choose the Base Reflectivity Tilt 1 type.
  6. For this exercise, we want to select a subset of all available times, so click on the Absolute times radio button. With this option selected, the server is queried for a set of available times for that type and these are listed in the Times: panel. Select the 11 images from 1998-06-29 21:00:00Z through 1998-06-29 21:59:00Z. Be sure the Data Type: is set to Reflectivity. Make sure the Create display option is checked, and then click the Add Source button.
  7. Change the background maps using the Default Background Maps Control. Show popup Turn on the North & Central America maps. the US Interstate Highways maps. Make sure all other maps are off. When you are finished, go back to the View Window.
  8. Use the Displays->Locations->US->U.S. Cities menu to overlay some place names. Change the display to show the locations using a custom layout by using the display control's Layout Model radio button in the control.
  9. Overlay a radar range ring grid using the Displays->Special->Range Rings menu.
  10. images/Level3Dvn.gif
  11. Start the animation. In this loop, you will see the bow echo move through the area. Restore the other view window from its minimized state. Notice that as the radar image loops through its steps, the corresponding satellite image is show in the other window. By default, animation steps are shared between views.
  12. Stop the animation in the radar loop window. Now start the animation in the satellite image display. Notice this time, that the satellite display controls the images that are shown in the radar display.
  13. Open the Time Animation Properties dialog in the satellite view window. Show popup Change the Share Times option to None and click the OK button.
  14. Now start the animation in the satellite display and notice that the two views animate independently.
  15. Stop the animation in both windows.
  16. Close the window you were viewing the satellite data in by clicking the X in the upper right corner of the window.

 


Previous: Loading Satellite Imagery Next: Probing Level III Data Table of contents Index Glossary Images Frames Français Español Portugese Italian Japanese Korean Russian Chinese-simp Chinese-trad Dutch German Greek Français Español Portugese Italian Japanese Korean Russian Chinese-simp Chinese-trad Dutch German Greek

U09-NRM-127: The role of Distributed Data Access Technologies in NRM - for ITC-IDV version 2.7 > Accessing and Displaying Data > Displaying Satellite and Level III Radar Imagery