ABSTRACT
Satellite measurements of the biosphere have now become common place in various aspects of large-scale environmental monitoring, including drought and crop monitoring. This was not the case until the launch of the Advanced Very High Resolution Radiometer (AVHRR) instrument on June 27, 1979, on board the –rst National Oceanic and Atmospheric Administration (NOAA) Advanced Television
2.1 Introduction ....................................................................................................23 2.2 Brief History of AVHRR ................................................................................25 2.3 Normalized Difference Vegetation Index .......................................................27
