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Proceedings Paper

Radiative-transfer-based retrieval of reflectance from calibrated radiance imagery measured by an imaging spectrometer for lithological mapping of the Clark Mountains, California
Author(s): Robert O. Green
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Paper Abstract

Spectral radiance imagery measured by the Airborne Visibleflnfrared Imaging Spectrometer (AVIRIS) are reduced to reflectance through compensation for atmospheric scattering water vapor absorption absorption of the well mixed gases solar irradiance and the solar zenith angle. The LOWTRAN 7 (Kneizys et al. 1989) radiative transfer code form the basis for this retrieval. LOWTRAN 7 is constrained with water vapor determinations from the AVIRIS radiance data through an algorithm operating on the 940 urn atmospheric water band for every spatial element. In situ measurements of atmospheric optical depths are used to constrain the LOWTRAN 7 aerosol models. Accuracy of the retrieved reflectance spectra is evaluated with respect to surface spectra measured at the time of the overflight. The mineral bastnaesite is identified in the analysis of the retrieved reflectance imagery. These reflectance data provide a means to map the subtle mineral gradients in the PreCambrian block of the Clark Mountain range in southeastern California for geological analysis. 1. 0

Paper Details

Date Published: 1 September 1990
PDF: 9 pages
Proc. SPIE 1298, Imaging Spectroscopy of the Terrestrial Environment, (1 September 1990); doi: 10.1117/12.21353
Show Author Affiliations
Robert O. Green, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 1298:
Imaging Spectroscopy of the Terrestrial Environment
Gregg Vane, Editor(s)

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