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Mirco Boschetti, Daniela Stroppiana, and Pietro Alessandro Brivio

(AVHRR), and Satellite Pour l’Observation de la Terre (SPOT) VEGETATION (VGT), have been exploited to build a long time series of fire-related information over large areas, on both continental and global scales ( Pu et al. 2007 ; Stroppiana et al. 2003 ), and are generally used for atmosphere studies such as those related to the carbon cycle and climate change ( Van der Werf et al. 2006 ). High-resolution (HR; 15–30 m) images, such as those provided by the Landsat Thematic Mapper (TM), SPOT High

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Silvia Merino-de-Miguel, Federico González-Alonso, Margarita Huesca, Dolors Armenteras, and Carol Franco

properties but also to discriminate and map burned areas. As shown by Lentile et al. ( Lentile et al. 2006 ), in most environments and fire regimes and at the spatial resolution of most satellite sensors (>30 m), burned vegetation results in a drastic reduction in NIR surface reflectance; this is typically accompanied by a rise in shortwave-infrared (SWIR) reflectance. Thus, several spectral indices have been created to integrate the NIR and SWIR bands, both of which register the strongest responses, in

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