An Integrated Long Time Series of 1km Resolution NDVI for Europe from the NOAA-AVHRR and SPOT-VEGETATION Sensors

This paper describes the newly processed 1 km resolution NDVI AVHRR archive over Europe and the integration of the data with the SPOT-VEGETATION NDVI archive. Investigation of the agreement between the two NDVI datasets pointed out a high linear correlation. The RMSE between the datasets is presented and varies for most of the area between 0.05 and 0.10. When applying the relative adjustment functions to account for the difference in spectral response function between the sensors, the RMSE was considerably reduced. The results presented here will be used to integrate the NDVI datasets from the various AVHRR sensors and from SPOT-VEGETATION.