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1. The effects of light polarization for different types of
an atmosphere are demonstrated here through the comparison of
simulations produced by the 6SV1 code in vector and scalar modes.
The
comparison shows that ignoring the effects of polarization leads to
large errors in calculated TOA reflectances. The maximum
((vector-scalar)/vector)*100% error is as large as
6.0%
for an ordinary mixed (molecular + aerosol) atmosphere. Therefore,
the accounting for
polarization is extremely important for atmospheric
correction of remotely sensed data, especially those measured over dark
targets, such as dark dense vegetation canopy or ocean surface.
2. In
addition to the effects of polarization, we also estimated
the influence of errors in TOA reflectance values produced by
the codes on the accuracy of aerosol optical thickness and surface
reflectance retrievals. The term "error" here implies all
differences originating from error sources associated with a
particular code. The estimation method is explained on slide 26 of
the Project Presentation.
(Please double click on
each blue item below to see or hide the results of the comparison.)
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