Remote sensing data respository for in-flight calibration of optical sensors over terrestrial targets

摘要: The present study is part of an investigation aimed at optimizing the use desertic sites for absolute or relative calibration satellite visible sensors. This effort includes characterization surface, gathering climatology atmospheric data sets, ground- and air- based measurements as well result various sensors over these sites. All estimates are stored in a repository made available to methods calibration. Post-launch degradation sensitivity sensor have been estimated using north african radiometrically stable targets. selected area first characterize terms bidirectional spectral reflectances by making POLDER capabilities, then cross-calibrate SeaWifs, VEGETATION on-board SPOT4 AVHRR NOAA-14 reference POLDER. Results compared with issued from other sources. Extensive period time spanned assess ability this method monitor long term trends evolutions. cross will be presented. developed presented well, order make it applicable sensor. A has also realized, considering synthetic data, allowing evalute main contributions error budget. need aerosol optical thickness evidenced, lead set up sun photometer on one 1999.