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4.2.0 Loading Satellite Imagery
Satellite imagery from geostationary and polar orbiting satellites is available through a network of servers supported by Unidata. Most of the imagery available on these servers covers the North America region. These servers use the Abstract Data Distribution Environment (ADDE) protocol.

First, we'll load in some visible imagery from the Bow Echo Case Study that we used in the Gridded Data section of the workshop.

  1. If other displays and data are already loaded, select the Edit->Remove All Displays and Data menu item or the icon in the toolbar to clear them out.
  2. Open the Data Source Chooser. Show popup Click on the Images tab.
  3. We'll load in some visible satellite imagery. In the Server: selector, choose adde.ucar.edu. In the Dataset: selector, choose CCS039. 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 images available in the dataset. From the Image Type: selector, choose the 1 km GOES-8 Visible type.
  5. You can either load in the last "n" images, or you can select by time. For this exercise, we want to select a subset of all available times, so click on the Absolute times radio button. When this option is selected, the server is queried for a set of available times for that type and these are listed in the Times: panel. Select Show popup the 7 images from 1998-06-29 16:15:00Z through 1998-06-29 22:15:00Z. Be sure that the Create display checkbox is selected and click the Add Source button.
  6. Change the background maps using the Default Background Maps Control. Show popup Turn on the North & Central America and the US Interstate Highways maps. Make sure all other maps are off. When you are finished, go back to the View Window.
  7. Use the Displays->Locations->US->U.S. Cities menu to overlay some place names. Change the color of the location text to be white using the display control's Edit->Color menu.
  8. Start the animation. In this loop, you will see a large super cell thunderstorm develop over Iowa during this period. Stop the animation and show the 20:15Z image.
  9. Zoom in over the super cell in eastern Iowa
  10. images/VisImage.gif
  11. This is visible imagery at 1 kilometer resolution. You can use the Pixel Sampling slider to see what the image would look like at a lower resolution.

 


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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