Effects of changing illumination zenith on mineral spectra
This data-set contains four kinds of data: 1. A readme file: The READ_ME.txt file records more information regarding the description of this supplementary data-set. 2. Mineral spectra: Two spectral libraries in ASCII format, one contains all pure mineral spectra measured with changing illumination angles, and another one contains spectra linearly mixed from the pure mineral spectra. 3. Analysis results on variation of spectral feature position and absorption depth with decreasing illumination zenith angle and spectral purity: 14 figures show the variation of the center position of spectral feature with changing zenith angle and spectral purity; Another 14 figures show the variation of absorption depth of spectral feature with changing zenith angle and spectral purity. 4. Rule figures: 70 figures show the variation of rule numbers produced by SAM (spectral angle mapper) and EDC (Euclidean distance classifier) while classifying mineral spectra with changing zenith angle and spectral purity.