AVHRR COMPATIBLE VEGETATION INDEX DERIVED FROM MERIS DATA

摘要

The AVHRR compatible vegetation index derived fromMERIS full resolution (FR) data is based on top ofatmosphere radiances (ESA L2 data). This continuityindex is developed using radiative transfer models forsimulating the reflectance of the broad spectral channelsof the NOAA – AVHRR and the small spectral bands ofMERIS. A linear combination of MERIS channelsdescribes each AVHRR channel. The weighting factorsare determined from the results of the modellingapproach taking into account atmosphere (SMAC),canopy and soil (SAIL) and leaves (SLOP). Thecontinuity index will be available as maximum valuecomposite (daily, 10-days and monthly). The firstvalidation results show good agreement between theAVHRR NDVI and the continuity index.