What are LuTex and GdTex in the extinction coefficients file? -------------- next part -------------- A non-text attachment was scrubbed... Name: Screen Shot 2017-03-21 at 12.21.01 PM.png Type: image/png Size: 32973 bytes Desc: not available URL: <http://public.kitware.com/pipermail/nirfast/attachments/20170321/ebd5d317/attachment-0001.png>