Introduction of the PHenology And Vegetation Earth Observation Service (PHAVEOS)

摘要

Monitoring vegetation biophysical variables, are key to understand the growth and functioning of vegetation and in turn, provide key inputs in the modelling of bio geochemical cycles. The PHenology And Vegetation EO Service realises the full spectral, spatial and temporal resolution of the MERIS instrument by generating of a range of biophysical variables on a daily basis. Levellb data undergoes geometric, radiometric and atmospheric correction before application of biophysical algorithms. The resulting Level 2 data is then resampled and composited to a 250m spatial grid to generate a daily Level 3 output products. Additional modelling steps are applied creating a time series of Level 4 biophysical maps which retain daily temporal resolution but with full spatial coverage. The development of advanced Web dissemination services should allow users to interactively assess, compare and download biophysical maps and phenology curves. PHAVEOS is laying the foundations for services that utilise the even higher spatial and temporal resolutions available from the upcoming Sentinel 2 and 3 series of EO platforms.