Description Usage Arguments Value Examples
Simulates light macro environment based on latitude, day of the year. Other coefficients can be adjusted.
1 | lightME(lat=40, DOY=190, t.d=12, t.sn=12, atm.P=1e5, alpha=0.85)
|
lat |
the latitude, default is 40 (Urbana, IL, U.S.). |
DOY |
the day of the year (1–365), default 190. |
t.d |
time of the day in hours (0–23), default 12. |
t.sn |
time of solar noon, default 12. |
atm.P |
atmospheric pressure, default 1e5 (kPa). |
alpha |
atmospheric transmittance, default 0.85. |
a list
structure with components
I.dir |
Direct radiation (μ mol m^{-2} s^{-1}). |
I.diff |
Indirect (diffuse) radiation (μ mol m^{-2} s^{-1}). |
cos.th |
cosine of θ, solar zenith angle. |
propIdir |
proportion of direct radiation. |
propIdir |
proportion of indirect (diffuse) radiation. |
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