Hi Ray,
yes, I got the CAT 7.4 from your website and installed it on ENVI 5.5.3 ( CAT does not appear on the menu when using envi classic, but it does not matter, as I am not using the classic gui ). I am working with the S data because there is not enough L data for this crater . Where L data is available , I will use it , otherwise I have use the S data . It seems the CAT tool would only identify ferric phases, that is why I am trying to use ENVI's spectral angle mapping tool with the "rocks.sli" library.
The CRISM data files I get from http://themis-data.asu.edu/ ( for example http://themis-data.asu.edu/viewer/crism#P=FRT0000A5AA_07_IF166L_TRR3&T=2 ) - not the processed ones , but the ones with the link on the page ( ddr1, lbl, .img etc)
Ralph