Using polarization measurements, the reflectance factor R(θi,ϕi,θr,ϕr) of two wheat canopies is divided into components due to specularly and diffusely reflected light. The data show that two key angles may be predicted, the angle of the polarizer for minimum flux and the angle of incidence of sunlight specularly reflected by a leaf to a sensor. The results show that specular reflection is a key aspect to radiation transfer by two canopies. Results suggest that the advent of heading in wheat may be remotely sensed from polarization measurements of the canopy reflectance.
© 1985 Optical Society of America
V. C. Vanderbilt, L. Grant, L. L. Biehl, and B. F. Robinson, "Specular, diffuse, and polarized light scattered by two wheat canopies," Appl. Opt. 24, 2408-2418 (1985)