Wind Energy Resource Atlas of the Philippines - NREL

where
U = the unknown wind speed at height z above ground;
U0 = the known speed at a reference height z0;
P = the unknown wind power density at height z above ground;
P0 = the known wind power density at a reference height z0;
α = the power law exponent.
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Wind Energy Resource
Atlas of the Philippines
An exponent of 1/7 (or 0.143), which is representative of well-exposed areas with low surface
roughness, is often used to extrapolate data to higher heights.