To acquire and prepare images follow the Directions link.
More tutorials can be found at:
- Image software http://cobweb.ecn.purdue.edu/~biehl/MultiSpec/Index.html
- Indepth tutorial http://rst.gsfc.nasa.gov/
- Globe remote sensing guide for teachers http://www.geo.utep.edu/pub/seeley/remote_sensing_lab.html
- ppt on remote sensing http://dynamo.phy.ohiou.edu/tutorial/tutorial_files/frame.htm