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1st week of March


Gago, Jorge, et al. "UAVs challenge to assess water stress for sustainable agriculture." Agricultural water management 153 (2015): 9-19.
If plants had water stress, they would close their stomata to prevent water from dissapating to the air. Evaporating less, leaf temperature increases. In remote sensing, there are some VIs or models. The formal requires reference data, such as VPD which must be site-specific. However, energy balance model enable plants water status to be calculated without any references.

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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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