“…The other portion of reflectance (1 − β), which reaches to the soil without seeing the canopy layer, is then reflected back to the sensor or absorbed by the soil surface (no interaction with the canopy layer). Under these approximations, the reflectance of this system, ρ λ (θ, φ, θ 0 ), at the view angle of (θ, φ) with the sun angle of θ 0 at the wavelength of λ is then represented by the following equation [30],…”