1 November 1989 Tree Canopy Radiance Measurement System
Author Affiliations +
Abstract
A system is described for obtaining both an estimate of the spatial mean bidirectional reflectance factor (BRF) for a tree canopy (displaying a horizontally heterogeneous foliage distribution) and the statistical significance of that estimate. The system includes a manlift support-ing a horizontal beam 7 m long on which are mounted four radiometers. These radiometers may be pointed, and radiance data acquired, in any of 11 view directions in the principal plane of the sun. A total of 80 data points, acquired in 3 min, were used to estimate the BRF of a walnut orchard 5 m tall and detect true differences of 12% of the mean approximately 90% of the time.
William Caldwell, William Caldwell, V. C. Vanderbilt, V. C. Vanderbilt, } "Tree Canopy Radiance Measurement System," Optical Engineering 28(11), 281227 (1 November 1989). https://doi.org/10.1117/12.7977124 . Submission:
JOURNAL ARTICLE
10 PAGES


SHARE
RELATED CONTENT

Methods for the calibration of SPOT4 HRVIR and vegetation
Proceedings of SPIE (October 03 1998)
Laboratory Calibration Of Field Reflectance Panels
Proceedings of SPIE (October 12 1988)
Spectral feature measurements and analyses of the East Lake
Proceedings of SPIE (November 03 2005)
Ratioing radiometer for use with a solar diffuser
Proceedings of SPIE (August 01 1991)
Absolute Calibration Of The SPOT-1 HRV Cameras
Proceedings of SPIE (November 25 1986)
Scientific basis of ASTER instrument design
Proceedings of SPIE (August 25 1993)

Back to Top