Effects of changing illumination zenith on mineral spectra

This data-set contains three sets of data:
1. Two ENVI spectral library files:

One library contains all pure mineral spectra measured with changing illumination angles
-Pure_mineral_spectra
-Pure_mineral_spectra.hdr
We name each spectrum in the pure mineral spectral libraries in this way: mineral name_zenith angle under which the spectrum is measured

For instance, a spectrum of gypsum measured under a zenith angle of 55° is named: gypsum_55

Another library contains spectra linearly mixed from the pure mineral spectra
-Mixed_spectra
-Mixed_spectra.hdr
We name each spectrum in the mixed mineral spectral library in this way: mixed_abbreviation of mineral name_zenith angle under which the spectrum is measured_spectral purity of the mineral spectrum
The abbreviation for mineral names are: "vivi" for vivianite, "gyp" for gypsum, "mala" for malachite, "brx" for borax, "cal" for calcite, "kao" for kaolinite, "mont" for montmorillonite
For instance, a mixed spectrum of kaolinite (spectral purity: 75%) measured under a zenith angle of 85° is named: mixed_kao_85_75

2. A pdf file named analysis results that contains all analysis results on variation of spectral feature position and absorption depth with decreasing illumination zenith angle and spectral mixing:

-14 figures show the variation of spectral feature depth on the original spectral with changing zenith angle and spectral purity
-14 figures show the variation of center wavelength position on the original spectral with changing zenith angle and spectral purity
-14 figures show the variation of spectral feature depth on the continuum removed spectral with changing zenith angle and spectral purity
-14 figures show the variation of center wavelength position on the continuum removed spectral with changing zenith angle and spectral purity
-14 Tables that show the magnitude of variation of feature parameters with decreasing zenith. The feature parameters are calculated based on the original spectra and the continuum removed spectra respectively.
The 14 Tables also show the Spear correlation coefficient of the variation of feature parameters with the increasing zenith angle.
-70 rule number figures:
We produced 70 rule figures to show the rule numbers from 2 classifiers when classifying the pure mineral spectra and mixed spectra.
We name each figure after a rule: classifier_rule_abbreviaiton of mineral name_spectral purity.