computeSunlit: Compute the fraction of sunlit folige given solar position, LAI and G value with the assumption of the symmetric distribution of leaf azimuth angle.
Description
Compute the fraction of sunlit folige given solar position, LAI and G value with the assumption of the symmetric distribution of leaf azimuth angle.
Usage
computeSunlit(Theta, G, LAI)
Arguments
Theta
Solar zenith angle.
G
The G value, namely the projection of foliage area.
LAI
Leaf area index.
Value
The fraction of sunlit foliage.
References
Wang, W. M., Li, Z. L., & Su, H. B. (2007).
Comparison of leaf angle distribution functions: effects on extinction coefficient and
fraction of sunlit foliage. Agricultural and Forest Meteorology, 143(1), 106-122.