Simple equation to approximate the bidirectional reflectance from vegetative canopies and bare soil surfaces

摘要: A simple equation has been developed for describing the bidirectional reflectance of some vegetative canopies and bare soil surfaces. The describes directional as a function zenith azimuth view angles solar angle. works simulated field measured red IR under clear sky conditions. Hemispherical can be calculated coefficients by integrating over hemisphere angles. single estimating was obtained using relationships between medium rough distributions. many useful applications such providing lower level boundary condition in complex plant canopy models an additional tool studying effects on pointable sensors.