Thank you sir. I will follow paper entitled ''Smectite deposits in Marathon Valley, Endeavour Crater, Mars, identified using CRISM hyperspectral reflectance data'' in this regard.
Sir I am also facing the same problem. Actually I am not getting any neutral spectra in the whole column and image, so my query is - is it necessary to do rationing?
Also continuum removed spectra is showing clear adsorptions. So can I go with the continuum removed spectra?