Hi all, I would like to  know if it is possible to unmix pixels (SMA) using ERDAS. I can only find explanations for ENVI, but I do not have it!

Any suggestion more than welcome.

Look at ERDAS IMAGINE's Subpixel Classifier,

http://erdas.com/products/ERDASIMAGINE/ERDASIMAGINE/ProductLiterature.aspx