Hi, Once you load the AVIRIS file in ENVI, open the Data Manager (icon in the toolbar, or File > Data Manager) to list the AVIRIS bands and wavelengths. You can also right-click on its filename in the Layer Manager and select View Metadata to see the bands, wavelengths, and other metadata. You might also be interested in the 'Preprocessing AVIRIS Data' tutorial, which can be used with ENVI 5.1 or later: http://www.exelisvis.com/...reprocessaviris.html