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5th week of July


An Approach for Foliar Trait Retrieval from Airborne Imaging Spectroscopy of Tropical Forests

Hyperspectral enables to retrieve diverse foliar traits. That is especially meaningful because only considering diverse traits allow to track functions. As structure could not only boost light interception but also burden to maintain the structure itself, physiological traits and structural traits show perpendicular relationship. So form follows function!

Reference

Martin, R. E., Chadwick, K. D., Brodrick, P. G., Carranza-Jimenez, L., Vaughn, N. R., & Asner, G. P. (2018). An approach for foliar trait retrieval from airborne imaging spectroscopy of tropical forests. Remote Sensing, 10(2), 199.

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4th week of june

Asner, G. P., Martin, R. E., Anderson, C. B., & Knapp, D. E. (2015). Quantifying forest canopy traits: Imaging spectroscopy versus field survey.  Remote Sensing of Environment ,  158 , 15-27. They use canopy sunlit reflectance at plot level and the trait samples from sunlit. The plot averaged refletance minimize canopy architectural effect. However actual field samples cover only 5% of a plot, the plot reflectance well explains canopy traits.
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AGU 2019

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2nd Week of August

Schaepman-Strub, Gabriela, et al. Reflectance quantities in optical remote sensing—Definitions and case studies. Remote sensing of environment 103.1 (2006) 27-42. If a surface was not an ideal specular or diffuse surface, one could observe diffuse light as well as specular light reflected off the surface. Reflectance is affected by where the incident light comes from and where the light is observed, which is represented by an angular distribution function. So different reflectance concepts are possible, so it is needed to use the term reflectance practically.
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