Soybean canopy reflectance as a function of view and illumination geometryReflectances were calculated from measurements at four wavelength bands through eight view azimuth and seven view zenith directions, for various solar zenith and azimuth angles over portions of three days, in an experimental characterization of a soybean field by means of its reflectances and physical and agronomic attributes. Results indicate that the distribution of reflectance from a soybean field is a function of the solar illumination and viewing geometry, wavelength, and row direction, as well as the state of canopy development. Shadows between rows were found to affect visible wavelength band reflectance to a greater extent than near-IR reflectance. A model describing reflectance variation as a function of projected solar and viewing angles is proposed, which approximates the visible wavelength band reflectance variations of a canopy with a well-defined row structure.
Document ID
19820044110
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Ranson, K. J. (Purdue Univ. West Lafayette, IN, United States)
Vanderbilt, V. C. (Purdue Univ. West Lafayette, IN, United States)
Biehl, L. L. (Purdue Univ. West Lafayette, IN, United States)
Robinson, B. F. (Purdue Univ. West Lafayette, IN, United States)
Bauer, M. E. (Purdue University West Lafayette, IN, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1981
Subject Category
Earth Resources And Remote Sensing
Meeting Information
Meeting: In: International Symposium on Remote Sensing of Environment