PET formulas (Heat Overlay)
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The physiological equivalent temperature PET is calculated for two possible options based on the situation:
- A cell is in the shade or it is night at time t: PETshade, night;
- A cell is in the sun during the day: PETsun;
PET Sun formula
The PET sun formula is as followed:
-13.26 + 1.25 · Ta,t + 0.011 Qgl,t - 3.37 · ln(ut) + 0.078 · Tw,t + 0.0055 · Qgl,tln(u) + 5.56·sin(ϕ) - 0.0103·Qgl,t·lln(u)sin(ϕ)+0.546Bb,t + 1.94*Svf.