ABSTRACT
ABSTRACT: The Mediterranean Extended Daily One-km AVHRR Data Set (MEDOKADS) has been generated at the Free University of Berlin (FUB) since 1989, continues in near real-time and already covers a climatological relevant period. At a spatial resolution of about 1 km it extends over Central Europe and the Mediterranean basin. Calibrated reflectances and brightness temperatures in different spectral regions are included as well as derived quantities like albedo, vegetation index, land and sea surface temperatures, cloud cover and classification. National Oceanic and Atmospheric Administration (NOAA) and National Aeronautics and Space Administration (NASA) have released the Pathfinder AVHRR Land (PAL) as long-term data set that has been processed in a consistent manner at a spatial resolution of 8 km covering a period of more than 20 years for global change research. 10 days and monthly maximum NDVI composites have been generated from daily Global Area Coverage (GAC) data. Both data sets represent the primary remote sensing data input to the DeSurvey (A Surveillance System for Assessment and Monitoring of Desertification) 6th framework EU research project in order to detect and analyze hot spots of desertification risks as well as trends in vegetation cover in the Mediterranean basin.
