ASD Document 600540 Rev. J 63 FieldSpec® 3 User Manual
www.asdi.com Chapter 7 Field Measurements
Non-photosynthetic components of the canopy have spectra which are
dominated by absorption features attributed to lignin and cellulose.
The spectral radiance leaving a vegetation canopy is significantly impacted by
many factors, such as those listed in
Table 7-1.
Table 7-1 Major variables affecting the Bidirectional Reflectance Distribution Function
(BRDF) of a vegetated canopy
Illumination
•Geometry
» angle-of-incidence of Sun (or Radar)
»azimuth
• Spectral characteristics
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