Archived Satellite Imagery

Due beginning of class, Monday 11 April 2011.

A. U.S.Navy Tropical Cyclone Imagery Archive

Access the U.S. Navy Tropical Cyclone Imagery Archive, linked to from the Class Website. We will get imagery for Hurricane Katrina. We will run through this in class, but you will need to do this at home, and save the images (and print them) locally from home. (30 points)

  1. The entry point for Katrina should have a default image of the storm's history. Click on it and save that image to disk. Print a color copy (if possible) at home. (10 points)
  2. Note the links for the Visible and Infrared Imagery in the far right hand table box. Katrina was at its most intense at 2245 UTC 28 Augus 2005t. Obtain a 1 km Visible Image (remember to click on it to get the largest, highest resolution image) and a 1 km Infrared Image (Choose Color) (remember to click on it to get the largest, highest resolution image) for those times and save them to disk. Print a color copy of each. (20 points)

B. CLASS Archive

Access the CLASS website, linked to from the Class Website. We will get imagery for the eastern Pacific for January 4, 2008. (70 points)

  1. Set yourself up with an account (it's free) with the CLASS system.
  2. Select from the choices on the right margin "Environmental Data from the Geostationary Satellites". We will want to get a visible and enhanced infrared satellite image for 1752 UTC 4 January 2008. We will use this opportunity to begin to learn the NCDC Weather and Climate Viewer (which will also be used to view radar data). So when the choice selections appear, one of them is "Area" (which are files that can be mapped onto true earth coordinates), leave that checked (and all others, as discussed in class). These are huge files and may take up to 12 hours to process. You'll get an email when the files are available. (Note: I am also ordering them so we can work with them in class next time). Once you get notified that the files are ready, download them into a folder on your hard drive. Class Example: 1845 UTC 4 January 2008.
  3. The next step will to be create a customized plot at 1 km resolution.
    • Load the Sector 1 File.
    • The area we'd like to zoom in on will be Northern California and Oregon, showing the structure of the frontal band and the open cell cumulus, from around Portland, Oregon to San Francisco. If you do this properly, you'll have a nice view of layered clouds, texturing along the frontal band,and the open cell cumulus offshore.
    • Once you have the image generally created, we'll fool around now with some background maps, and just create an overlay of the counties (with their names).
    • Now select from the File pulldown menu "Save Image". Just save as a jpeg to the desktop to see what you end up with. You could also save as .kmz file, which will save a file that can be opened in Google Earth.
    • Print this graphic. (Note: the example at left is one hour after the image I've asked you to get and print. You'll have to go through all the steps above to create and print your own image).