Preliminary Results Of Aerosol Optical Thickness
From MIVIS Data
Author(s)
C. Bassani, R. M. Cavalli & S. Pignatti
Abstract
Aerosols are the principal atmospheric constituents which the radiative field in the
atmospheric window of solar spectral domain depends on. This dependence have
to be considered when the radiative quantities of the atmosphere are simulated for
solving the radiative transfer equation written for at sensor signal. The most important
parameter for these simulations is the aerosol optical thickness at wavelength
of λ = 550 nm, τa(λ = 550 nm), that is an input of the atmospheric radiative
transfer codes used by the scientific community. The study carried out is based on
the estimation of τa(λ = 550 nm) starting only from the MIVIS (Multispectral
Infrared and Visible Imaging Spectrometer) remote sensing data. A minimization
algorithm is applied to a quadratic cost function of the τa(λ = 550 nm) variable.
In this paper are presented the preliminary results obtained from the MIVIS image
processing in particulary pixels that satisfy both the conditions of lambertianity
and spectral homogeneity of the surface.
Keywords: aerosol optical thickness, atmospheric radiative transfer, scattering,
remote sensing.
1 Introduction
The aerosols are significant atmospheric constituents to estimate and predict direct
component of climate forcing by scattering and absorption of solar and infrared
radiation in the atmosphere [1]. Besides, Houghton et al. [1] showed that the
aerosol mass and particle number concentrations are highly variable in space and
time representing one of the largest uncertainties in climate change studies. In the
Keywords
aerosol optical thickness, atmospheric radiative transfer, scattering,
remote sensing.
Related Book
Other papers in this volume
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