Miglioramento della risoluzione spaziale di immagini TIR MODIS su aree costiere

Thermal mapping of water bodies is an highly relevant tool for the study of thermal pollution, an issue to which increasing attention is paid. Remote sensing is an useful tool for monitoring large surface in near real time, but the main limiting factor is the spatial resolution. In this work it is shown the spatial improvement of MODIS thermal imagery on coastal water obtained with the SWTI (Sharpening Water Thermal Imagery) algorithm that allows to increase spatial resolution from 1 km to 250 m. SWTI is applied to two MODIS images, acquired on the lagoon of Venice and the delta of the Po river. As a reference we use a couple of ASTER images acquired simultaneously to the MODIS images and on the same areas. The root mean square errors computed excluding outliers are lower than 1.5 K that can be considered satisfactory when compared with the ASTER and MODIS temperature accuracies.