Specifics of using atmospheric correction algorithms to determine the brightness of the Black Sea on days of dust transport from MODIS satellite data
E.B. Shybanov, A.S. Papkova, D.V. Kalinskaya
Marine Hydrophysical Institute National Academy of the RAS, Sevastopol, Russia
Keywords: atmospheric correction, remote sensing, reflectance, dust aerosol, AOD, microparticles, concentration
Abstract
In this study, three dates of dust transport over the Black Sea are considered. During the analysis of MODIS-Aqua satellite images, probable dust pixels were determined, confirmed by field measurements of ground-based Cimel-318 photometers (AERONET station). Further, using the method of principal components (covariance analysis), the contribution of dust to the variability of the values of the spectral brightness coefficient of the sea was estimated. In the cases of dust transport, the spectral properties of the first vector are explained by the presence of an absorbing aerosol distributed over the height. The absorption effect reduces the amount of brightness reflected by the entire atmosphere in the viewing direction. In the case of a clean atmosphere, the first eigenvector has minimal errors of atmospheric correction, and all variability is due to the reflective properties of the sea water.
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