Abstract

As an aid in the interpretation of remotely sensed data from row crops with incomplete canopies, a model was developed that allowed the calculation of the fractions of sunlit soil, shaded soil, sunlit vegetation, and shaded vegetation for each resolution element in a scan of a remote sensor for a given set of conditions (plant cover, plant height/width ratio, row spacing, row orientation, time of day, day of year, latitude, and size of resolution element). Using measured representative reflectances of the four surfaces, composite reflectances were calculated as a function of view angle. Also, representative temperatures for each surface were used to simulate composite temperatures viewed by an IR scanner. With composite reflectances and temperatures known as a function of view angle, ways were explored to extract plant cover and plant temperature data from the composite data.

© 1979 Optical Society of America

Influence of solar illumination angle on soybean canopy reflectance

J. C. Kollenkark, V. C. Vanderbilt, C. S. T. Daughtry, and M. E. Bauer
Appl. Opt. 21(7) 1179-1184 (1982)

Plant canopy light absorption model with application to wheat

J. E. Chance and E. W. LeMaster
Appl. Opt. 17(16) 2629-2636 (1978)

Variation of directional reflectance factors with structural changes of a developing alfalfa canopy

J. A. Kirchner, D. S. Kimes, and J. E. McMurtrey
Appl. Opt. 21(20) 3766-3774 (1982)

Dynamics of directional reflectance factor distributions for vegetation canopies

D. S. Kimes
Appl. Opt. 22(9) 1364-1372 (1983)

Coupled atmosphere/canopy model for remote sensing of plant reflectance features

Siegfried A. W. Gerstl and Andrew Zardecki
Appl. Opt. 24(1) 94-103 (1985)