Apologies for the lack of a useful Buil link, but you may also want to take a look at the AOD function in ISIS if you’re correcting your spectra using references taken at different altitudes, times and varying atmospheric conditions. I’ve used it for pro-am collaborations where high cadence spectra were required – in some cases using the same IR correction curve over several months. In recent times I’ve become less sure of the AOD tool (lacking the time to dig into the detail of aerosol theory among other things).
Also – for the benefit of other newcomers, make sure you scale your miles comparison spectrum to the same range as your processed spectra when comparing the two. This appears to be the case with your plots John, but I just thought I’d mention it for others. In ISIS this is the “Normalize” button on the “Profile” page. The values applied to a comparison should match the ones you used for processing your spectra (specified on the “Settings” page) otherwise you’ll usually see a big offset.
Cheers from the southern colony,