Spectral Unmixing Applied to Desert Soils for the - Naval ...

LIST OF TABLES
Table 1. This table lists the absorption feature depths for each soil spectrum using
the continuum removed function and the deepest portion of the feature.
The values listed show changes in the depth of features for the same
material under different disturbance conditions for wavelengths of ~500
nm, 1125 nm , and 2200 nm. The depths are ordered by greatest to least
disturbance and show, for the most part, a trend of decreasing depth,
increasing depth, and decreasing depth at 500 nm, 1125 nm, and 2200 nm,
respectively……….. ........................................................................................51
Table 2. This table shows the differences in absorption feature depth from the
imagery derived Zunyite endmembers corresponding to the approximate
deepest point of the absorption features at wavelengths of 500 nm, 1125
nm, and 2200 nm. The pattern of difference (features decreasing in depth
with greater disturbance) in the 500 nm range were used to try and predict
endmembers of greatest disturbance for the Zunyite endmembers because
it shows a close value for average depth differences to that of the clay
spectra…………….. ........................................................................................59
Table 3. This table shows the depths for the zunyite features in the order of
decreasing feature depth at 500 nm. It is inconclusive how the pattern of
feature depth change is associated with different levels of disturbance,
though patterns of change with respect to the reference endmember 28 can
be seen. These are imagery derived endmembers so the level of
disturbance is unknown. Without proper ground-truthing there is no way
to be sure if a relationship exists, however the similarity between these
patterns and those in the clay spectra suggests disturbance can be
correlated with these changes in depth as well. ...............................................60
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