computeGEllip: Compute the G value given lamda (the parameter of ellipsoidal function) and beam direction.
Description
Compute the G value given lamda (the parameter of ellipsoidal function) and beam direction.
Usage
computeGEllip(lambda, theta)
Arguments
lambda
The parameter of ellipsoidal function given leaf angle distribution mearuements.
theta
The zenith angle of beam direction.
Value
The G value.
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.