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Proceedings Paper

Calibrated intercepts for solar radiometers used in remote sensor calibration
Author(s): David I. Gellman; Stuart F. Biggar; Philip N. Slater; Carol J. Bruegge
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Paper Abstract

Calibrated solar radiometer intercepts allow spectral optical depths to be determined for days with intermittently clear skies. This is of particular importance on satellite sensor calibration days that are cloudy except at the time of image acquisition. This paper describes the calibration of four solar radiometers using the Langley-Bouguer technique for data collected on days with a clear, stable atmosphere. Intercepts are determined with an uncertainty of less than six percent, corresponding to a maximum uncertainty of 0.06 in optical depth. The spread of voltage intercepts calculated in this process is carried through three methods of radiometric calibration of satellite sensors to yield an uncertainty in radiance at the top of the atmosphere of less than one percent associated with the uncertainty in solar radiometer intercepts for a range of ground reflectances.

Paper Details

Date Published: 1 August 1991
PDF: 6 pages
Proc. SPIE 1493, Calibration of Passive Remote Observing Optical and Microwave Instrumentation, (1 August 1991); doi: 10.1117/12.46695
Show Author Affiliations
David I. Gellman, Optical Sciences Ctr./Univ. of Arizona (United States)
Stuart F. Biggar, Optical Sciences Ctr./Univ. of Arizona (United States)
Philip N. Slater, Optical Sciences Ctr./Univ. of Arizona (United States)
Carol J. Bruegge, Jet Propulsion Lab. (United States)


Published in SPIE Proceedings Vol. 1493:
Calibration of Passive Remote Observing Optical and Microwave Instrumentation
Bruce W. Guenther, Editor(s)

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