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Proceedings Paper

Accounting For Diffuse Irradiance On Reference Reflectance Panels
Author(s): Ray D Jackson; Philip N Slater; M.Susan Moran
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Paper Abstract

Measurements of surface reflectance factors in the field are usually made under conditions of total (direct and diffuse) irradiance. However, the reference panel reflectance factor R(r/e) used to convert the target measurement to reflectance is frequently determined using only direct irradiance. A method for determining the diffuse-irradiance reflectance factor, 11,1.4(0°,/e), of a calibrated field-reference panel from a knowledge of the direct-irrA.ance reflectance factor, Rd.,(0°,/0), is described. The magnitude of the error involved if only the direct irradiance reflectance factor is known, usually from laboratory calibration, was found to vary from -2% to +5%, depending on zenith angle, atmospheric conditions, and the particular reflectance panel used.

Paper Details

Date Published: 12 October 1988
PDF: 8 pages
Proc. SPIE 0924, Recent Advances in Sensors, Radiometry, and Data Processing for Remote Sensing, (12 October 1988); doi: 10.1117/12.945692
Show Author Affiliations
Ray D Jackson, U. S. Department of Agriculture (United States)
Philip N Slater, University of Arizona (United States)
M.Susan Moran, U. S. Department of Agriculture (United States)


Published in SPIE Proceedings Vol. 0924:
Recent Advances in Sensors, Radiometry, and Data Processing for Remote Sensing
Philip N. Slater, Editor(s)

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